Chevrolet Corvette
Exhaust Manifolds

Year Casting Numbers Application
1955 Left: 3837069 Right: 3836968 2nd-Design V-8
1956 Left: 3725563 Right: 3725563
Left: 3731557 Right: 3731558
1st Design, All engines
2nd Design, All Engines
1957 Left: 3733975 Right: 3733976 All Engines
1958-61 Left: 3749965 Right: 3750556 All Engines
1962 Left: 3749965 Right: 3750556
Left: 3797901 Right: 3797902
250 Horsepower 327 Engines
300, 340, & 360 Horsepower 327 Engines
1963 Left: 3749965 Right: 3750556
Left: 3797901 Right: 3797902
Left: 3797942 Right: 3797902
250 HP (all), & 300 HP ( Powergide)
300 HP (Manual Trans.) & All 340 HP 327 Engines
360 Horsepower 327 Engines
1964 Left: 3846559 Right: 3747038
Left: 3846559 Right: 3750556
Left: 3846563 Right: 3797902
Left: 3846563 Right: 3797942
Left: 3797942 Right: 3797902
250 & 300 HP With M35 Powerglide & C60 Air Conditioning
250 & 300 HP ( M35 Powerglide)
300 HP (Manual Trans.) & 365 HP ( No Air Conditioning)
365 Horsepower With C60 Air Conditioning
375 Horsepower 327 Engines
1965 Left: 3846559 Right: 3750556
Left: 3846563 Right: 3797902
Left: 3846559 Right: 3747038
Left: 3846559 Right: 3747042
Left: 3846563 Right: 3797902
Left: 3846563 Right: 3797942
Left: 3846563 Right: 3797942
Left: 3797942 Right: 3797902
Left: 3856301 Right: 3856302
250 HP (all) & 200 HP (M35 Powerglide)
300 HP With Manual Transmission
Early 250 HP (all) & 200 HP (M35 Powerglide) With C60 A.C.
Early 250 HP (all) & 200 HP (M35 Powerglide) With C60 A.C.
350 & 365 HP Without Air Conditioning
300 (with manual trans.), 350 & 365 HP; All with C60 A.C.
350 & 365 HP With C60 Air Conditioning
375 Horsepower 327 Engines
425 Horsepower 396 Engines
1966 Left: 3846559 Right: 3747042
Left: 3872765 Right: 3872778
Left: 3880827 Right: 3880828
300 & 350 Horsepower 327 Engines
300 & 350 HP with K19 A.I.R.
390 & 425 HP 427 Engines
1967 Left: 3846559 Right: 3747042
Left: 3872765 Right: 3872778
Left: 3880287 Right: 3880828
300 & 350 Horsepower 327 Engines
300 & 350 HP with K19 A.I.R.
390, 400, 435 HP & L88 427 Engines
1968 Left: 3872765 Right: 3872778
Left: 3880827 Right: 3880828
All 327 Cubic-Inch Engines
All 427 Cubic-Inch Engines
1969 Left: 3872765 Right: 3932461
Left: 3880827 Right: 3880828
All 350 Cubic-Inch Engines
All 427 Cubic-Inch Engines
1970 Left: 3846559 Right: 3989036
Left: 3872765 Right: 3932461
Left: 3969869 Right: 3880828
300 & 350 Horsepower 350 Engines
370 HP LT1 350 Engines with A.I.R.
390 Horsepower LS5 454 Engines
1971 Left: 3846559 Right: 3989036
Left: 3872765 Right: 3932461
Left: 3880869 Right: 3880828
Left: 3880869 Right: 3880828
270 Horsepower 350 Engines
330 HP LT1 350 Engines (A.I.R.)
365 HP LS5 454 Engines
425 HP LS6 454 Engines (A.I.R.)
1972 Left: 3932461 Right: 3989036
Left: 3932461 Right: 3932461
Left: 3932461 Right: 3932461
Left: 3969869 Right: 3880828
Early 200 Horsepower 350 Engines
Later 200 Horsepower 350 Engines
255 HP LT1 350 Engines with A.I.R.
270 HP LS5 454 Engines with A.I.R.
1973-77 Left: 3932461 Right: 3932461
Left: 3969869 Right: 3880828
All 1973-77 350 Engines
All 1973-77 454 Engines

 

 

 

In 1964 there were four different motor choices for the buyers to consider.
327 Small Block V8 ( Standard ) - 250HP
327 Small-Block V8 ( L75 ) 300 HP
327 Small-Block V8 ( L76 ) 365 HP
327 Small-Block V8 ( L84 ) 375 HP

Engine Block
3782870
- 327 Cubic Inches - All V8 Engines.
 

Heads
3795896
- 327 Cubic Inches - Base 250 HP Engine

3782461
- 327 Cubic Inches - All Optional Engines

Cranks

2680- 327 crank, forged steel, main diameter 2.30", rod diameter 2.20", stroke 3.25"
4577- 327 crank, forged steel, main diameter 2.30", rod diameter 2.20", stroke 3.25"
3782680- 327 crank, forged steel, main diameter 2.30", rod diameter 2.20", stroke 3.25"
3815822- 283 crank, forged steel, main diameter 2.30", rod diameter 2.00", stroke 3.00"
3849847- 283 crank, forged steel/cast, main diameter 2.30", rod diameter 2.00", stroke 3.00"
3876764- 283 crank, forged steel/cast, main diameter 2.30", rod diameter 2.00", stroke 3.00"
3876768- 283 crank, forged steel/cast, main diameter 2.30", rod diameter 2.00", stroke 3.00"

Intake Manifolds
3844457
- Cast Iron 250 HP 327 Cubic Inches
3799349 - Cast Iron 300 HP ( early, usage unverified ) 327 Cubic Inches
3844459 - Cast Iron 300 HP  327 Cubic Inches
3844461 - Aluminum 365 HP 327 Cubic Inches

Exhaust Manifolds
3846559
- Left Side 250 HP with A/C - 300 HP with Powerglide and A/C
3747038 - Right Side

3846559 - Left Side 250 HP with Man. Trans or Powerglide 300 HP with Powerglide
3750556 -
Right Side

3846563 - Left Side 300 HP with Man. Trans or 365 HP without A/C
3797902 -
Right Side

3846563 - Left Side 365 HP with A/C
3797942 -
Right Side

3797942 - Left Side 375 HP with Fuel Injection
3797902 -
Right Side

Distributors (part number)

1111015- 283 195hp, used on passenger cars, Chevelle, Chevy II
1111051- 283 220hp, used on Chevelle
1111066- 283 195hp, used on passenger cars, Chevelle, Chevy II
1111069- 327 365hp, used on Chevelle and Corvette (L79)
1111071- 327 250/300hp, used on Chevelle

Camshafts (part number)

3733431- 195/220hp 283 and 250/300 327, lift .398, duration 300, cast# 3732798, cast symbol diamond
3849346- 365hp 327 (L79), lift 485, duration 346, cast# 3849347, no cast symbol

Alternators (part number)

1100665*- 55 amp, used on passenger, Corvette, Chevy II, and Chevelle
1100668*- 37 amp, used on passenger, Corvette, Chevy II, and Chevelle
1100669*- 42 amp, used on passenger, Corvette, Chevy II, and Chevelle
1117765*- 62 amp, used on passenger, Chevy II, and Chevelle

Carburetors (part number)

Carter
3720
- 300hp 327, automatic transmission, Chevrolet PN 3851762
3721- 300hp 327, standard transmission, Chevrolet PN 3851761
Holley
2818
- 365hp 327 (L79), standard transmission, model 4150, Also used on 300hp 327, Corvette applications and limited           Chevelle
Rochester 2bbl
7024100
- 283, used on passenger, Corvette, Chevy II, and Chevelle
7024101- 283, used on passenger, Corvette, Chevy II, and Chevelle
7024102- 283, used on passenger, Corvette, Chevy II, and Chevelle
7024106- 283, used on passenger, Corvette, Chevy II, and Chevelle
7024108- 283, used on passenger, Corvette, Chevy II, and Chevelle
7024110- 283, used on passenger, Corvette, Chevy II, and Chevelle
7024112- 283, used on passenger, Corvette, Chevy II, and Chevelle

Rochester 4bbl
7024120
- 283 220hp
7024122- 283 220hp
7024125- 283 220hp
7024126- 283 220hp
7024220- 283 220hp
7024225- 283 220hp
7024426- 283 220hp

Transmissions