Intake Manifold Casting Numbers - 1964 through 1972

These intake manifold castings were used in various other models of the Chevrolet lineup such as the passenger car, Chevy II/Nova, Camaro and Corvette. Only Chevelle-specific information is listed here to conserve space. Some casting numbers are NOT listed as they may have been used in other models of the Chevrolet lineup but were NOT used in the Chevelle.

The casting number is probably the most significant feature on an intake manifold. The casting date is usually found near the casting number.

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.  For example, C259 indicates a date of March 25, 1969.

It's important to remember the 'to' and 'from' dates listed may vary due to production lead time and stock inventories being depleted. For example just because a particular intake casting may be listed as being used in 1964 doesn't imply that the engine assembly plants discarded all pre-1964 intakes or immediately after the model production year discard all intakes they had in inventory to begin using the newer design.

V8 Intake Manifold Casting Month Codes
A - JanuaryB - FebruaryC - MarchD - April
E - MayF - JuneG - JulyH - August
I - SeptemberJ - OctoberK - NovemberL - December

Caveats to production dates. Due to inventories, shipping schedules, etc. it is entirely possible that intake manifolds being phased out of production may still appear on Chevelles built after that time.

Manifold
Number
YearEngineHorsepowerNotes
38444611964
1965
327
327
350
350
Aluminum with Holley 4-bbl. Riveted oil splash shield.
38409051964
1965
283
283
195
195
Cast iron with Rochester 2-bbl. Riveted oil splash shield.
38444571964283
327
220
250
Cast iron with Carter WCFB or Rochester carburetor. Riveted oil splash shield.
38444591964
1965
327
327
300
300
Cast iron with Carter AFB. Riveted oil splash shield.
38669631965396375Aluminum with Holley 4-bbl. No oil splash shield.
38669221965283
327
220
250
Cast iron with Carter or Rochester 4-bbl.
38562891966396325 w/A.I.R.Cast iron with Rochester and A.I.R.
38669481966
1966
1967
396
396
396
325 w/o A.I.R.
360
350
Cast iron with Holley 4-bbl. No oil splash shield. "Holley" cast into top of manifold.
38727831966327275 w/o A.I.R.Cast iron with Holley 4-bbl.
38759541966327275 w/A.I.R.Cast iron with Rochester 4-bbl.
38776521966283195Cast iron with Rochester 2-bbl.
38828581966283220Cast iron all 4-bbl. Used extensively as service replacement.
38839481966
1967
1968
396
396
396
325 w/A.I.R.
325
325, 350
Cast iron with Rochester 4-bbl. No oil splash shield
38850691966
1967
1968
396
396
396
375
375
375
Aluminum with Holley 4-bbl
Three designs, a 3-hole closed plenum, a 2-hole closed plenum and an open plenum. The 3-hole was used from August of 1965 through June of 1967. The 2-hole plenum was used for the 1968 model year and the open plenum was used on Corvette only. No oil splash shield. First with divorced choke design.
38904901966
1967
327
327
350
325
Aluminum with Holley 4-bbl. Chevrolet does report any 327/350 engines installed in 1966 Chevelles.
39053931967327275Cast iron with Rochester 4-bbl.
39198781967
1968
396
396
375
375
Aluminum with Holley 4-bbl. Unverified if OE installed from late 1967 through early 1968. This manifold may have been used extensively as a service replacement. No oil splash shield
39198011968307200Cast iron with Rochester 2-bbl. Riveted oil splash shield.
39198031968327250, 275, 325Cast iron with Rochester 4-bbl. Riveted oil splash shield. Temperature sending hole is plugged
39163131969
1970
350
350
250
250
Cast iron with Rochester 2-bbl. No oil splash shield.
39331631969396375Aluminum with Holley 4-bbl. Possible late 1968 application. Identical to #3885069 except addition of heater outlet boss on upper right thermostat passage. No oil splash shield.
39271831969
1970
307
307
200
200
Cast iron with Rochester 2-bbl. Oil fill tube and water by-pass boss eliminated. Heater nipple boss drilled and tapped on right thermostat passage.
39271841969350255, 300Cast iron with Rochester 4-bbl.
39310671969396325, 350Cast iron with Rochester 4-bbl. Heater nipple boss drilled and tapped on right thermostat passage.
39635691970402
454
375
450
Aluminum with Holley 4-bbl. Low rise intake. Riveted oil splash shield.
39552871970
1971
402, 454
402, 454
330, 350, 360
300, 365
Cast iron with Rochester 4-bbl. Low rise intake. No oil splash shield.
39655771970350300Cast iron with Rochester 4-bbl.  Oil splash shield.
39734651971307200Cast iron with Rochester 2-bbl. Heater outlet boss on upper right thermostat passage. Oil splash shield.
39734671971350245Cast iron with Rochester 2-bbl. Heater outlet boss on upper right thermostat passage. Oil tube boss eliminated. Oil splash shield.
39734691971350270Cast iron with Rochester 4-bbl. Heater outlet boss on upper right thermostat passage. Oil splash shield.
62629361972307130Cast iron with Rochester 2-bbl. Heater outlet boss on upper right thermostat passage. Oil tube boss eliminated. Oil splash shield. Intake runners have numbers cast for their port.
62637511972350175Cast iron with Rochester 4-bbl. Heater outlet boss on upper right thermostat passage. Oil tube boss eliminated. Oil splash shield. Intake runners have numbers cast for their port.
62637521972350165Cast iron with Rochester 2-bbl. Heater outlet boss on upper right thermostat passage. Oil tube boss eliminated. Oil splash shield. Two accessory bosses between #5 and #5 runners.
62637531972402, 454240, 270Cast iron with Rochester 4-bbl. Intake runners have numbers cast for their port. No oil splash shield.

CHEVELLESTUFF  All Rights Reserved

CHEVELLESTUFF  All Rights Reserved

CHEVELLESTUFF  All Rights Reserved
CHEVELLESTUFF  All Rights Reserved
Always seems to be exceptions to the rules. This casting #3955287 intake has numbered runners and oil splash shield - neither of which it was supposed to have.