Holley Date Code ChartThe date code is a four digit code (1354) so it's a replacement carb from what I've researched and the "4" is the year of manufacture. Needle & Seat Primary Main Jet Secondary Main Jet or plate Primary Metering Block Secondary Metering Block Power Valve Pump Nozzle Size, Primary Secondary. 1967 290 Carter AFB 6045 1967 290 American, Classic Carter AFB 4352 1967 290 American S/T Carter AFB 4353 1967 343 Carter AFB 6046 1967 343 Export (R. Holley Carburetor Numerical Listings Carb. ) If you don’t have the VIN, you can still identify the engine by visual inspection if you know what to look for. decodes to be 1st week of April 1964. From the Chevelle site: LIST-3310 is the Holley number and 3878261 is the. Holley Carburetors with 3 digit Numeric date codes. Turn the screws all the way in until lightly seated. Holley date codes swerven Mar 3, 2011 1 2 Next Mar 3, 2011 #1 S swerven Veteran Member Mar 11, 2009 101 Gone Anybody ever seen a date code like this?. 00 Back in stock soon Date code reads 471 call for completion date Out of stock SKU: HOL24-2818 Category: Carburetors-Restored Description Additional information Description Holley 4 Barrel LIST 2818-1 1964 CORVETTE Carburetor. (NYSE: HLLY), a leading platform serving performance automotive enthusiasts, today announced financial results for its first. Your carb has an abbreviated throttle linkage plate. 1967/1977/1987/1997 - See more Reply Save Like F fordman460 · #6 · Aug 21, 2009. A quick reference replacement parts guide to all Holley carbs. * Exhaust Manifold Casting Numbers/Dates * Holley Carburetor Numbers/Dates * Ignition Coil Numbers * Intake Manifold Casting Numbers/Dates * Paint/Plating, Engine Compartment * Rochester Carburetor Numbers/Dates * Spark Plug (AC Delco OEM) * Spark Plug and Coil Wires * Starter Numbers/Dates * Water Pump Casting Numbers/Dates. Numbers Holley Holley Carburetor Numerical Index The numbers below are stamped Holley List numbers. The date code will be right below it. - The fourth digit is the LAST year of the DECADE. The numbers below are stamped Holley List numbers. Next, back them out 1 full turn and restart the engine making sure the choke is completely off. Holley date codes Share 5 posts 65slick 416 Feb 27, 2013 #1 Trying to figure out the date code on my Holley and ran across this site. The Holley 4-digit date code is based on the Julian callender. From the Chevelle site: LIST-3310 is the Holley number and 3878261 is the Chevrolet part number for a 1965 396 Chevelle according to my Chevrolet parts counter book. Holley List Numbers Previous Page First Page Next Page Previous Page First Page Next Page The Carburetor Doctor contact us. The date codes on factory Holley carbs were 3-digits up to 1973, and 4 digits thereafter. The three didgit codes, the first number is the last of the year. ranks as one of Holley’s best sellers even today. By visual inspection The easiest way to tell the difference is to check the 8th digit of the Vehicle Identification Number (VIN) on the original vehicle. A date code should appear below the list number. Locate the lone four-digit code. Family owned since 1995, The Carburetor Doctor ships premium-quality parts daily from our TX warehouse to customers worldwide. C3AE-9510-B Holley list 2668 63-64 427 Ford & Merc HiPerf 4V Metering 3903/3814 C3AF-9510-CA Holley list 2855 63 1/2 427 Ford 4V Metering C4AF-9510-CU Holley list 2926 64 2x4 427 High Riser primary 4v. Trying to figure out the date code on my Holley and ran across this site. Install a vacuum gauge to a full manifold vacuum port. The 4 digit codes carbs are over the counter replacements or aftermarket. 194678S400001 through 194678S428566 The 1 stands for the Chevrolet Motor Division. 3000S-3999S 4000S-4998S 6025S-6651S 7000S-7082S 8000S-8835S 9000S-9811S Alphanumeric codes - Ball & Ball carbs About Casting Numbers vs. This carburetor has a part number of R3910 LIST 3910 and used on 67 Chevy 396 427. You would need to have a three digit date code starting with 6 or 7 for that to be an assembly line carb. Most of the individual parts on your Camaro have a date code to indicate the time of manufacture. Maybe you can find a Holley-equipped car or truck and grab the link (leave the carb). Holley Carburetor Numerical Index Holley Carburetor Numbers Home Numbers Holley Holley Carburetor Numerical Index The numbers below are stamped Holley List numbers. The date code will be right below it. Figure 1 DISASSEMBLY: Rest the carburetor on a repair stand to avoid damage to the throttle. So, C9AF means 1969, D9AF means 1979 and so on. HOLLEY CARBURETOR LIST 2818 1964 CORVETTE $ 1,025. For 1959 most or all went to the Carter AFB and yes I think they were all 2v for 60-62. Restored to its original Holley. This carburetor has a part number of R3837 LIST 3837 and used on 66-67 Chevy 3/8 tube in base. Kit: Float (Brass) Float (Nitrophyl) Pull Off: Choke: Diaphragm: Manual: R-1847A : 1959 Edsel, 361 Eng. , May 11, 2023 -- ( BUSINESS WIRE )--Holley Inc. Two common model numbers for both auto and truck applications include the 4150 and 4160. The numbers show it's a 1972 Z/28 with auto trans carb. It's like a "VIN" for your carburetor and should be hand-stamped on the front of the choke tower to the right of the vent tube on most typical Holley carbs. Holley® Performance Products 1801 Russellville Road Bowling Green, KY. It's important to remember the 'to' and 'from' dates listed may vary due to. This carburetor has a part number of 1850-1 and used on 600 CFM. My question is how to decode holley date codes? To me it would decode as 6=1966 B=feburary 2=feburary 2nd. ) * Hub Caps & Wheel Covers * Interior Trim Codes * Paint Charts (PPG) 1964-1972 * Paint, Special Order Body. If the carb has a three digit date code it left the factory on a car. In 1973, Holley went to 4 digit Julian calendar date codes. Description 1 Choke Lever and Swivel AssemblyFast Idle Cam Plate Screw 2 3 Fast. Holley_date_code_chart. 972: Year: Month: Week: 7 - 1967 8 - 1968 9 - 1969: 1. Cylinder heads have casting numbers with date coding like the engine block. The three digit date code is broken down with the first number being the year of manufacture, the second number (or letter) being the month of manufacture (1 through 0 for January through October, and then the letters A and B for November and December), and the third number being the week of the month. The mentioned above date 0170, this would be the 17th day of a year ending 0. * Exhaust Manifold Casting Numbers/Dates * Holley Carburetor Numbers/Dates * Ignition Coil Numbers * Intake Manifold Casting Numbers/Dates * Paint/Plating, Engine Compartment * Rochester Carburetor Numbers/Dates * Spark Plug (AC Delco OEM) * Spark Plug and Coil Wires * Starter Numbers/Dates * Water Pump Casting Numbers/Dates Transmission Stuff. Trying to figure out the date code on my Holley and ran across this site. 1 - 9 = January through September. Holley EFI Datalogger Instructions for V3 software. This is a Chevelle 396 engine Carburetor. Holley date codes swerven Mar 3, 2011 1 2 Next Mar 3, 2011 #1 S swerven Veteran Member Mar 11, 2009 101 Gone Anybody ever seen a date code like this? AFAIK three digit codes ended after 1972. Check here for specific Muscle car Info: Referenced by ; Holley 1850-1. Understand the date code format: Holley carburetor date codes follow a specific format: the first three digits represent the day of the year, and the last digit represents the year. A date code should appear below the list number. Some US Fords of the 70s and 80s had Holley carbs as OE. Many transmissions also have a number or letter date which indicated the shift. The 6th digit is an 8 and it is for the year. Decoding them is as follows: Three Digit - Example 763 > 7 - Year (1967) , 6 - Month (June) , 3 - (Third Week) Four Digit - Example 0798 > 079- Day of Year (would land in March) , 8 - 1978/1988/1998/2008. A friend of mine has a Holley 3997788 6238-1. It's like a "VIN" for your carburetor and should be hand-stamped on the front of the choke tower to the right of the vent tube on most typical Holley carbs. Holley Carburetor Numerical Index Holley Carburetor Numbers Home Numbers Holley Holley Carburetor Numerical Index The numbers below are stamped Holley List numbers. This sample code is from a 1969 BOSS 302 carburetor with date code 951. The date codes on factory Holley carbs were 3-digits up to 1973, and 4 digits thereafter. The code numbers of a Holley carburetor are usually located on the side of the air horn. While at idle, back them out 1/8 turn at a time, alternating between the 2 or 4, until highest vacuum is achieved. Moving on, 0798 is our date code; Holley used a three digit up to 1973, after which they moved to the four digit code you see here. Four digit codes on GM Holleys started in the 1972-1973 area. Mar 3, 2011 #2 K5JMP Veteran Member Lifetime Gold Member Oct 19, 2006 10,223 MORTUORUM VENATOR - Z. In terms of the DOT Date Code, some might assume that the number states when the tire was approved. If your looking for a certian date code I should be able to help. The '6' is not likely 1986 or 1996, so it makes sense it's 1976. Locate the lone four-digit code. The 3 digit format was year-month-week, and the 4 digits were julian date (day 001 to 365 of the year) and last digit of year (doesn't clarify which decade though). Many transmissions also have a number or letter date which indicated the shift. About Us. Here, we'll take a look at some of the basic 1969 Camaro variations, options, and trim codes using rare GM historical photos and videos, as well as secret photos retrieved from our archives that. Although this may seem confusing, dating a Holley carburetor is generally not too difficult. Holley List Numbers Next Page Next Page The Carburetor Doctor contact us. All the earlier GM carbs had three digit date codes. Holley Carburetors 4 digit Numeric date. Although this may seem confusing, dating a Holley carburetor is generally not too difficult. The format is as follows:YDDDWhere: Y is the last digit of the year DDD is the day of the year (001 to 365). Holley EFI Quick Start Guide. Moving on, 0798 is our date code; Holley used a three digit up to 1973, after which they moved to the four digit code you see here. For example, C259 indicates a date of March 25, 1969. Kit Kit Needle Jet or Plate Block Block Power Valve Nozzle & Seat Size 0-1848-1 4160 465 37-119 37-933 6-506 122-57 N/S N/S 34R9716-3 125-85. Shelby Ford Mustang 289 302 351 390 406 427 428 429, K code hipo, cobra jet, Boss, Intake manifold, Exhaust manifolds valve covers gaskets, classic race vintage images pictures. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5. The code numbers of a Holley carburetor are usually located on the side of the air horn. Holley EFI 16 Injector Setup. Ford decade prefixes: B: 1950's C: 1960's D: 1970's E: 1980's F: 1990's All Ford carburetors have the number '9510' in them. or from Holley directly. The mentioned above date 0170, this would be the 17th day of a year ending 0. CODE-9510C : CK39 : F032 : CM003: R-1921A : 1960 Comet & Falcon, 144. Casting and date codes are also on each major component and many ancillary pieces. This sample casting number from a 1970 carburetor with date code 0995. All Holley vacuum secondary carbs have that link originally, so they are easy to find. Referenced by ; Holley R3837 or LIST 3837. The first two and last six digits of the vehicle VIN (ex: 1F123456) are shown in the photos below. Is there a way to tell what year? 74? 84? etc. This Carburetor has the original Holley color. ranks as one of Holley’s best sellers even today. Description Additional information Description Holley 3837 Chevelle SS Carburetor 1967 396 date code 6A3. Please consider creating a new thread. The three digit date code is broken down with the first number being the year of manufacture, the second number (or letter) being the month of manufacture (1 through 0 for January through October, and then the letters A and B for November and December), and the third number being the week of the month. The three didgit codes, the first number is the last of the year. In 1966, the 3310 was dropped as an OE carb and introduced into the aftermarket. If the vehicle was a Mustang, this six digit number starts with a "1". You will find that the Holley model number of the carburetor is there, along. The list number typically is four to six digits long. Trying to figure out the date code on my Holley and ran across this site. D) Carter AFB 4355 1967 343 Ambassador A/T Carter AFB 4354 1967 343 American, Ambassador Carter AFB 4258 1967 343 American, Ambassador Carter AFB 4216. Holley carb decoding 2204 Views 1 Reply 2 Participants Last post by Hot Rod Todd, Mar 14, 2010 M mrmuncie Discussion Starter·Mar 14, 2010 Add to quote Share Only show this user Anyone have any idea what this carb is from? 5752553 List 1849 6B4 build Lee (in Louisville, Ky) Second owner 69 SS Camaro 350 A/C Stick I specialize in Muncie 4 speeds. Holley date codes Share 5 posts 65slick 416 Feb 27, 2013 #1 Trying to figure out the date code on my Holley and ran across this site. It's like a "VIN" for your carburetor and should be hand-stamped on the front of the choke tower to the right of the vent tube on most typical Holley carbs. For the kickdown I suggest a cable unit like the Lokar. The List number for a Model 2010, 2300, 4010, 4011, 4150, 4160, 4165, or 4175 carburetor can be found on the right side of choke air horn. Below the list number is a date code that will contain no more than four (4) digits. Although this may seem confusing, dating a Holley carburetor is generally not too difficult. Also, any idea of it's value?. Is this right or does holley have some strange style of code? See more Reply Save Like 1 - 6 of 6 Posts 6 67stang · #2 · Nov 27, 2003 Me thinks 6-1966, B-Feb, 2-second of the month. The 3 digit format was year-month-week, and the 4 digits were julian. Starting in the late 1950's they usually consist of an alphanumeric code. ~ The person who doesn't listen to the media is the best informed. Holley 5200 5210 5220 6500 6510 6520. Holley date codes Share 5 posts 65slick 416 Feb 27, 2013 #1 Trying to figure out the date code on my Holley and ran across this site. 194678S400001 through 194678S428566 The 1 stands for the Chevrolet Motor Division. Holley 4150 4160 4165 4175 4180 4190. There were no coupes made during the T-Top years. 1968 date code would be an over the counter speed part, either from Chev. I don't believe there's any record of 3245 carbs on any new GM vehicles in 1976, so the DC suffix doesn't likely denote a factory install. The date codes will vary from 3 to 4 digits. Holley Four-Digit Date Codes. Holley date codes swerven Mar 3, 2011 1 2 Next Mar 3, 2011 #1 S swerven Veteran Member Mar 11, 2009 101 Gone Anybody ever seen a date code like this? AFAIK three digit codes ended after 1972. date code that will contain no more than four (4) digits. I could never imagine an engine as huge as a 430 with a 2-barrel on top. Holley Date Codes FZ-28's Mar 6, 2004 Mar 6, 2004 #1 FZ-28's Veteran Member Dec 18, 2001 951 Cleveland, Ohio I have read conflicting information on what. Figure 1 DISASSEMBLY: Rest the carburetor on a repair stand to avoid damage to the throttle plates during the renew procedures. 1970 Corvette Registry - Numbers & Date Codes 1970 Corvette Registry Major Component Codes Note: Some of the number codes & usage guidelines here have been updated based on the NCRS Technical Judging Guidelines. And yes, the date codes on Holley carburetors are decoded as follows: first number is the year (in this case 1969), second number is the month (in this case 4 = April), and the third number is the week it was produced (in this case 2 = second week). The numbers below are stamped Holley List numbers. (a littel math involvedsorry) 1-365 except for "leap. The three digit date code is broken down with the first number being the year of manufacture, the second number (or letter) being the month of manufacture (1 through 0 for January through October, and then the letters A and B for. Carb Numbers Most of the cast (aluminum, iron or zinc) components of a Carter carburetor have a casting number, which is a raised number, cast into the part. Ford and Mustang bellhousings flywheels. The first letter of the number represents the decade and the next number is the year. Most of the individual parts on your Camaro have a date code to indicate the time of manufacture. All Holley vacuum secondary carbs have that link originally, so they are easy to find. Registered. A quick reference chart for picking out a carb. All of the steel hardware has the original factory plating. The number above that in the picture is the General Motors id number 3908957-EJ. Jeff Helms -65 Z16 Survivor (Red/black/white int. The Holley 4-digit date code is based on the Julian callender. Holley Carburetors 4 digit Numeric date codes. * Engine Block Stamping ID/Date/CE (Chevrolet Engine) Information * Engine Suffix Codes (V8) - Chevelle specific - 1964 through 1972 by year * Engine Suffix Codes (V8) - All Chevrolet - 1955 through 1975 by code * Exhaust Manifold Casting Numbers/Dates * Holley Carburetor Numbers/Dates * Ignition Coil Numbers * Intake Manifold Casting Numbers/Dates. Holley EFI 16 Injector Setup. Discussion Starter · #1 · Mar 23, 2015. This carburetor was made by Holley , The Holley Brothers Company was started in 1905 in Detroit Michigan then became the Holley Carburetor Co. Holley Carburetors with 3 digit Numeric date codes. Intake manifolds are normally date coded in the form of a letter for the month (see table below), two numbers for the day and a single number for the year. Holley carburetors were first used on the ’64 365-hp. Date Codes. A friend of mine has a Holley 3997788 6238-1. Last # on my 4 diget date code is 3. The 1536 is the date code and breaks down as a carb built in June of 1976. Rebuilding tranys for 20 years with over 50 Muncies to select from. Holley Carburetors with 3 digit Numeric date codes. Older carburetors have a three-digit code, while carbs made. com 199R10013 Revision Date: 1-24-14. Holley Carburetors with 3 digit Alphanumeric date codes. The 4 digit codes carbs are over the counter replacements or aftermarket. The Holley model number is present along with the auto maker part number, if factory-issued, a date and application code. Carb Numbers Most of the cast (aluminum, iron or zinc). Understand the date code format: Holley carburetor date codes follow a specific format: the first three digits represent the day of the year, and the last digit represents the year. 600: 37-119 37-933: 6-506 122-66: 134-9134-128: 125-65 0. The Holley 4-digit date code is based on the Julian callender. The remaining six digits are the last six of the vehicle VIN. ) ( Survivor Z16 Picture album) -65 Z16 drag car, unrestored (Red/Red) -65 SS Convertible (Red) -65 300 2-dr Wagon, Modified (Tuxedo Black) -66 SS L78 Coupe (Marina Blue), unrestored. The casting date is usually found near the casting number. This sample code is from a 1969 BOSS 302 carburetor with date code 951. Holley® Performance Products 1801 Russellville Road Bowling Green, KY 42101 1-270-781-9741 1-866-464-6553 www. Some US Fords of the 70s and 80s had Holley carbs as OE. So you should look for the lone four-digit code. The former chart was based exclusively on magazine publications. Exploded View Part Numbers Q & A Setup Specs Vacuum Secondary Spring Chart. THE JUDGING AT FLINT 5 1WINTERIZING YOUR CORVETTE 5 11957 FUEL INJECTION IGNITION DISTRIBUTORS 5 11961-62 FUEL INJECTION IDENTIFICATION 5 11958-59 FUEL INJECTION UNIT IDENTIFICATION 5 11961-62 PAINT NUMBERS 5 1CORVETTE MODELS 5-1 5 11963-65 FUEL INJECTION AIR CLEANER 5 1FLINT, MI MEET 5 11953 CORVETTE PLANT PHOTOS 5 11963-67 PANEL ALIGNMENT 5 …. 2204 Views 1 Reply 2 Participants Last post by Hot Rod Todd, Mar 14, 2010. The casting date is usually found near the casting number. The date codes will vary from 3 to 4 digits. 1 - 1st shift 2 - 2nd shift A - 1st shift B - 2nd shift D - day shift N - night shift There is another code near the valve stem that indicates the day of the month, 1 - 31. Holley EFI 16 Injector Setup (8 Cylinder Engines) Setup of 8 Injectors in 8:2 Amp Peak and Hold Mode. date code that will contain no more than four (4) digits. And yes, the date codes on Holley carburetors are decoded as follows: first number is the year (in this case 1969), second number is the month (in this case 4 = April), and the third number is the week it was produced (in this case 2 = second week). * Exhaust Manifold Casting Numbers/Dates * Holley Carburetor Numbers/Dates * Ignition Coil Numbers * Intake Manifold Casting Numbers/Dates * Paint/Plating, Engine Compartment * Rochester Carburetor Numbers/Dates * Spark Plug (AC Delco OEM) * Spark Plug and Coil Wires * Starter Numbers/Dates * Water Pump Casting Numbers/Dates Transmission Stuff. The list number typically is four to six digits long and may or may not have a suffix number behind it. The 4th and 5th numbers stand for convertible (37) or T-Top (67). The List number for the 4500 can be found on the top of the main body casting. The number above that in the picture is the General Motors id number 3886087-EJ. A guide to locating these number is here. The three digit date code is broken down with the first number being the year of manufacture, the second number (or letter) being the month of manufacture (1 through. 025: Plain 108-83-2: 108-89-2 108-90-2: 108-27-2 134-101: 134-105 112-20: 1-1/4 1-5/16: 1-9/16. In 1973, Holley went to 4 digit Julian calendar date codes. * Exterior Paint Codes * Fisher Body Number Plate (trim tag) Facts * Fisher Body Number Plate (trim tag) option codes for 1964 through 1967 * Frames/ID/partial VIN Locations * Guide Charts (parking lamps, tail lamps, etc. You will find that the Holley model number of the carburetor is there, along with the automaker part number if it is factory issued, as well as a date and application code. 600: 37-119 37-933: 6-506 122-66: 134-9134-128: 125-65 0. If the carb has a three digit date code it left the factory on a car. com/holley/datecode. 1968 date code would be an over the counter speed part, either from Chev. Reply Save Like Art Stgeorge · #9 · Nov 13, 2022 DuceNova said:. Secondary Primary Secondary Secondary Throttle Throttle. Holley Three-Digit Date Codes. - The first three digits are the day of the year. Check here for specific Muscle car Info: Referenced by ; Holley R3910 or LIST 3910. The GM number on this carb is 3849804. Moving on, 0798 is our date code; Holley used a three digit up to 1973, after which they moved to the four digit code you see here. The three digit date code is broken down with the first number being the year of manufacture, the second number (or letter) being the month of manufacture (1 through 0 for January through October, and. Below the list number is a date code that will contain no more than four (4) digits. The first digit ("1") denotes 1971, the second digit ("F") is the Assembly Plant code. Decoding the Ford Holley date code. See more Reply Save Like HwyStarJoe Discussion Starter · #9 · Feb 20, 2012 Thanks all. You will find that the Holley model number of the carburetor is there, along with the automaker part number if it is factory issued, as well as a date and application code. Holley Date Codes FZ-28's Mar 6, 2004 Mar 6, 2004 #1 FZ-28's Veteran Member Dec 18, 2001 951 Cleveland, Ohio I have read conflicting information on what date codes were used for original and replacement Holley carbs during the 70's. We had one of those too, a 60 Merc 430-2v. 2300-EG Diagram. Holley carb decoding. Understand the date code format: Holley carburetor date codes follow a specific format: the first three digits represent the day of the year, and the last digit. The Date Code is when the tire was manufactured (not when it was approved). Check out the link My date code is 1733 http://www. Tech Service: (502) 781-9741. 427 Tunel Port, 427 Cammer SOHC, Mustang Boss 429 BOSS 351 and BOSS 302 parts ID decode and date code decoding Shelby Ford Mustang 289 302 351 390 406 427 428 429, K code hipo, cobra jet, Boss, Intake manifold, Exhaust manifolds valve covers gaskets, classic race vintage images pictures. Bounght my 83310-1 in 2003 even though its not on the list. Other manufacturers do not use a four-digit model number. Older carburetors have a three-digit code, while carbs made after 1972 used a four-digit code. 3000S-3999S 4000S-4998S 6025S-6651S 7000S-7082S 8000S-8835S 9000S-9811S Alphanumeric codes - Ball & Ball carbs About Casting Numbers vs. The date codes on factory Holley carbs were 3-digits up to 1973, and 4 digits thereafter. ranks as one of Holley’s best sellers even today. So you should look for the lone four-digit code. Holley Four-Digit Date Codes. The list number typically is four to six digits long and. Maybe you can find a Holley-equipped car or truck and grab the link (leave the carb). In terms of the DOT Date Code, some might assume that the number states when the tire was approved. Some information in this manual will not apply to V2 and earlier software versions. The code numbers of a Holley carburetor are usually located on the side of the air horn. Use the exploded view, for the model of carburetor you have, as a guide and follow the numerical sequence in general to disassemble unit far. And yes, the date codes on Holley carburetors are decoded as follows: first number is the year (in this case 1969), second number is the month (in this case 4 = April), and the third number is the week it was produced (in this case 2 = second week). 0 =October A =November B =December 95 1. Check here for specific Muscle car Info. Home Choke Circuits Date Codes Exploded View Part Numbers Q & A Setup Specs Vacuum Secondary Spring Chart. (a littel math involvedsorry) 1-365 except for "leap-year1-366. The identification number and the date of manufacture are stamped into the forward vertical surface of the air horn. It's like a "VIN" for your carburetor and should be hand-stamped on the front of the choke tower to the right of the vent tube on most typical Holley carbs. This is an older thread, you may not receive a response, and could be reviving an old thread. Check out the link My date code is 1733 http://www. or from Holley directly. Bounght my 83310-1 in 2003 even though. Holley Four-Digit Date Codes. The Holley model number is present along with the auto maker part number, if factory-issued, a date and application code. 427 Tunel Port, 427 Cammer SOHC, Mustang Boss 429 BOSS 351 and BOSS 302 parts ID decode and date code decoding. 025: Plain 108-83-2: 108-89-2 108-90-2: 108-27-2 134-101: 134-105 112-20: 1-1/4 1-5/16: 1-9/16. Decoding them is as follows: Three Digit - Example 763 > 7 - Year. Ford and Mustang bellhousings flywheels. The date codes will vary from 3 to 4 digits. As far as I could find, that Holley was only on the "real" 430, the 1958 430/360 and 430/375 (not sure if there is any diff between those). Primary & Primary Secondary Primary Secondary Primary Carburetor Model CFM Renew Trick Secondary Main Main Jet Metering Metering Primary Discharge Part No. Numbers Holley Holley Carburetor Numerical Index The numbers below are stamped Holley List numbers. On the contrary, the DOT symbol by itself simply indicates that the tire is approved by the Department of Transportation to be legally used on the road. Kit: Float (Brass) Float (Nitrophyl) Pull Off: Choke: Diaphragm: Manual: R-120-3A : 1934-48 Ford Pass. Description Original Holley 3419 CARBURETOR date code 634.