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Chevelle Holley Carburetors

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Holley Carburetor Numerical Listing (Requires Adobe Reader). Where ECL code is known, it is shown.

Year	Engine Specifics	GM Model #-ECL	Holley List #
65	w/Sp. H/Per. (327)	3863150-DG ⁽⁴⁾	3043A
65	396	3878261-EH	3310A

66	396 (exc. P.G., A.I.R., H/Per.)	3874898-ER	3139A
66	w/P.G. (396) (exc. A.I.R., H/Per.)	3868864-ES	3140A
66	w/P.G. (327) (exc. A.I.R., Sp. H/Per.)	3875964-DB	3230A
66	w/H/Per. (396) (exc. A.I.R., P.G.)	3886087-EJ	3419A
66	P.G. w/H/Per. (396) (exc. A.I.R.)	3886088-EX	3420A
66	(A.I.R. w/P.G.) w/H/Per. (396)	3892338-EZ	3608A
66	(A.I.R. w/H/Per.) (396) (exc. P.G.)	3892339-EY	3609A
66	w/Sp. H/Per. 396	3893229	3613A

67	w/Sp. H/Per. (exc. A.I.R.) (327)	3903389-DC	3806A
67	w/Sp. H/Per., A.I.R. (327)	3903391-DV	3807-1A
67	w/H/Per., A/T (exc. A.I.R.) (396)	3908956-EX	3836A
67	w/H/Per. (exc. A/T, A.I.R.) (396)	3908957-EJ	3837A
67	w/H/Per., A.I.R., A/T (396)	3908958-EZ	3838A
67	A.I.R., w/H/Per. (exc. A/T) (396)	3908959-EY	3839A
67	w/Sp. H/Per. (exc. A.I.R.) (396)	3916143-CT	3901A⁽¹⁾
67	A.I.R. w/Sp H/Per. (396)	3916145	3911A

68	w/Sp. H/Per. (exc. A.T) (396)	3923289-DZ	4053

69	w/Sp. H/Per. (396)	3959164-GE	4346

70	w/Sp. H/Per. (exc. A/T, E.E.C.) (396,454)	3967477-GG	4557⁽²⁾
70	w/Sp. H/Per., E.E.C., (exc. A/T) (396,454)	3967479-GM	4491
70	w/Sp. H/Per., A/T, E.E.C. (396/454)	3969894-GP	4556
70	w/Sp. H/Per., A/T (exc. E.E.C) (396/454)	3969898-GR	4492

71	w/Sp. H/Per., (exc. A/T) (454)	3986195	4803⁽³⁾
71	w/Sp. H/Per., A/T (454)	3986196	4802
⁽¹⁾ The GM part number 3916143 appears in both the AIM and the Chevrolet Parts & Accessories Catalog. The Holley List Number 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. ⁽²⁾ GM's Information Kit for 1966 also shows Holley model #3876747 for L30 w/manual transmission. ⁽³⁾ The LS6 engine was canceled for the 1971 model year. ⁽⁴⁾ Some may not be stamped with the suffix DG Service replacement with May 2nd week, 1971

Holley Three-Digit Date Codes - Through 1972
1st Digit		2nd Digit		3rd Digit
Stamp	Year	Stamp	Month	Stamp	Week
4	1964	1	January	1	1st week
5	1965	2	February	2	2nd week
6	1966	3	March	3	3rd week
7	1967	4	April	4	4th week
8	1968	5	May	5	5th week
9	1969	6	June
0	1970	7	July
1	1971	8	August
2	1972	9	September
		0	October
		A	November
		B	December

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The 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.

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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.)

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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.

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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

Holley Four-Digit Date Codes - 1973 and later
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

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Holley 4-barrel carburetor dated 0348 - 034=February, 8=1978.
Service replacement for 1971 Chevelle 454 w/manual transmission.

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Holley 4-barrel carburetor dated 2016 - 201=July, 6=1976.
Service replacement for 1969 Chevelle Special High Performance.

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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.

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