Holley Carburetors
Some may apply to Passenger, Chevy II [Nova], Camaro and Corvette as well. Non-Chevelle carburetors are not listed.Holley Carburetor Numerical Listing (Requires Adobe Reader)
| Year(s) | Engine Specifics | GM Part # | Holley Assy # |
| 66 | 396 (exc. P.G., A.I.R., H/Per.) | 3874898 | 4-3139A |
| 66 | w/P.G. (396) (exc. A.I.R., H/Per.) | 3868864 | R-3140A |
| 65 | w/Sp. H/Per. (327) | 3863150 | R-3043A |
| 65 | 396 | 3878261 | R-3310A |
| 66-67 | w/Sp. H/Per. (exc. A.I.R.) (327) | 3903389 | R-3806A |
| 66 | w/P.G. (327) (exc. A.I.R., Sp. H/Per.) | 3875964 | R-3230A |
| 66 | w/H/Per. (396) (exc. A.I.R., P.G.) | 3886087 | R-3419A |
| 66 | P.G. w/H/Per. (396) (exc. A.I.R.) | 3886088 | R-3420A |
| 66 | (A.I.R. w/P.G.) w/H/Per. (396) | 3892338 | R-3608A |
| 66 | (A.I.R. w/H/Per.) (396) (exc. P.G.) | 3892339 | R-3609A |
| 66 | w/Sp. H/Per. 396 | 3893229 | R-3613A |
| 66-67 | w/Sp. H/Per., A.I.R. (327) | 3903391 | R-3607-1A |
| 67 | w/H/Per., A.T. (exc. A.I.R.) (396) | 3908956 | R-3836A |
| 67 | w/H/Per. (exc. A.T., A.I.R.) (396) | 3908957 | R-3837A |
| 67 | w/H/Per., A.I.R., A.T. (396) | 3908958 | R-3838A |
| 67 | A.I.R., w/H/Per. (exc. A.T.) (396) | 3908959 | R-3839A |
| 67 | w/Sp. H/Per. (exc. A.I.R.) (396) | 3916143 | R-3901A(1) |
| 67 | A.I.R. w/Sp H/Per. (396) | 3916145 | R-3911A |
| 68 | w/Sp. H/Per. (exc. A.T) (396) | 3923289 | List 4053 |
| 69 | w/Sp. H/Per. (396) | 3959164 | List 4346 |
| 70 | w/Sp. H/Per. (exc. A.T., E.C.S.) (396,454) | 3967477 | List 4557 |
| 70 | w/Sp. H/Per., E.C.S., (exc. A.T.) (396,454) | 3967479 | List 4491 |
| 70 | w/Sp. H/Per., A.T., E.C.S. (396/454) | 3969894 | List 4556 |
| 70 | w/Sp. H/Per., A.T. (exc. E.C.S.) (396/454) | 3969898 | List 4492 |
| 71 | w/Sp. H/Per., (exc. A.T.) (454) | 3986195 | List 4803 |
| 71 | w/Sp. H/Per., A.T. (454) | 3986196 | List 4802 |
| 71 | w/Sp. H/Per. (exc. A.T.) (454) | 3986197 | |
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A.I.R. - Air Injection Reactor (1) The GM part number 3916143 appears in both the AIM and the Chevrolet Parts & Accessories Catalog. The Holley List Number R-3901A appears in the Chevrolet Parts & Accessories Catalog. It is suspected that the Holley List Number is 3901 in the catalog is a misprint and should be 3910.
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| Holley Three-Digit Date Codes - Through 1972 | |||||
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1st Digit |
2nd Digit |
3rd Digit |
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| Stamp | Year | Stamp | Month | Stamp | Week |
| 5 | 1965 | 1 | January | 1 | 1st week |
| 6 | 1966 | 2 | February | 2 | 2nd week |
| 7 | 1967 | 3 | March | 3 | 3rd week |
| 8 | 1968 | 4 | April | 4 | 4th week |
| 9 | 1969 | 5 | May | 5 | 5th week |
| 0 | 1970 | 6 | June | ||
| 1 | 1971 | 7 | July | ||
| 2 | 1972 | 8 | August | ||
| 9 | September | ||||
| 0 | October | ||||
| A | November | ||||
| B | December | ||||
Here's an infamous 3310 Holley (GM number 3878261EH) used on the 1965
396 L72 (Z16) engine. Note the date code of 072 indicates it is a dealer
service part since the date code is 1970, July, 2nd week.
Another 3310 Holley (GM number 3878261EH) used on the 1965 396 L72 (Z16)
engine. Again a service part with a date code of 142, or 1971, April,
5th week.
Holley 3230 4-barrel carburetor dated 502 - 5=1965, 0=October, 2=2nd
week.
Original equipment for 1966 Chevelle 327 w/P.G. (exc. A.I.R., Sp. H/Per.)
Holley 3613 4-barrel carburetor dated 641 - 6=1966, 4=April, 1=1st week.
Original equipment for 1966 Chevelle 396 Special High Performance.
Holley 4053 4-barrel carburetor dated 7A1 - 7=1967, B=December, 1=1st
week
1968 Chevelle L78 Special High Performance.
Holley 4053 4-barrel carburetor dated 833 - 8=1968, 3=March, 3=3rd week
1968 Chevelle L78 Special High Performance.
Holley 4346 4-barrel carburetor dated 944 - 9=1969, 4=April, 4=4th week
1969 Chevelle L78 Special High Performance. Compare with service replacement
unit below dated 2016.
Holley 4492 4-barrel carburetor dated 9A1 - 9=1969, A=November, 1=1st
week
1970 Chevelle L78/LS6 Special High Performance w/TH400.
Holley 4557 4-barrel carburetor dated 992 - 9=1969, 9=September, 2=2nd
week
1970 Chevelle L78/LS6 Special High Performance w/M22
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Holley Four-Digit Date Codes - 1973 and later |
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First Three Digits |
Fourth Digit | |||
| Julian Date Stamp | Month | Year | ||
| Regular Year | Leap Year | Stamp | Year | |
| 001-031 | 001-031 | January | 3 | 1973 |
| 032-059 | 032-060 | February | 4 | 1974 |
| 060-090 | 061-091 | March | 5 | 1975 |
| 091-120 | 092-121 | April | 6 | 1976 |
| 121-151 | 122-152 | May | 7 | 1977 |
| 152-181 | 153-182 | June | 8 | 1978 |
| 182-212 | 183-231 | July | 9 | 1979 |
| 213-243 | 214-244 | August | 0 | 1980-1990 |
| 244-273 | 245-275 | September | 1 | 1981-1991 |
| 274-304 | 276-305 | October | 2 | 1982-1992 |
| 305-334 | 306-335 | November | ||
| 335-365 | 336-366 | December | ||
Holley 4-barrel carburetor dated 0348 - 034=February, 8=1978.
Service replacement for 1971 Chevelle 454 w/manual transmission.
Holley 4-barrel carburetor dated 2016 - 201=July, 6=1976.
Service replacement for 1969 Chevelle Special High Performance.
Holley 4-barrel carburetor dated 2853 - 285=October, 3=1973.
Service replacement for 1967 L34 w/o A.I.R., Manual Transmission.
Holley carburetors with -'n' numbers generally fall into decade categories; -2 for the 60s, -3 for the 70s, -4 for the 80s, and -5 for the 90s. Hence a 3310-4 would probably have a date code in the 1980s.
