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1968 - 1982 Corvette Specification Guide
(1968-1982 Intake Manifold Casting Numbers)

1968 Intake Manifold Casting Numbers

3919803	Cast Iron	300 & 350 Horsepower 327 Engines
3919849	Aluminum	390 Horsepower 427 Engine
3919850	Aluminum	Early 400 Horsepower 427 Engine
3937795	Aluminum	Late 400 Horsepower 427 Engine
3885069	Aluminum	L88 (possible)
3933198	Aluminum	L88 (possible)
3919852	Aluminum	Early 435 Horsepower 427 Engine
3937797	Aluminum	Late 435 Horsepower 427 Engine

1969 Intake Manifold Casting Numbers

3927184	Cast Iron	300 & 350 Horsepower 350 Engines
3947801	Aluminum	390 Horsepower 427 Engine
3937795	Aluminum	400 Horsepower 427 Engine
3937797	Aluminum	435 Horsepower 427 Engine
3933198	Aluminum	435 Horsepower & ZL1 427 Engines

1970 Intake Manifold Casting Numbers

3965577	Cast Iron	300 & 350 Horsepower 350 Engines
3972110	Aluminum	370 Horsepower LT1 350 Engine
3955287	Aluminum	390 Horsepower 454 Engine
3969802	Aluminum	390 Horsepower 454 Engine

1971 Intake Manifold Casting Numbers

3973469	Cast Iron	270 Horsepower 350 Engine
3959594	Aluminum	330 Horsepower LT1 350 Engine
3955287	Cast Iron	365 Horsepower LS5 454 Engine
3967474	Aluminum	425 Horsepower LS6 454 Engine
3963569	Aluminum	425 Horsepower LS6 454 Engine

1972 Intake Manifold Casting Numbers

6263751	Cast Iron	200 Horsepower 350 Engine
3959594	Aluminum	255 Horsepower LT1 350 Engine
6263753	Cast Iron	270 Horsepower LS5 454 Engine

1973 Intake Manifold Casting Numbers

3997770	Cast Iron	190 Horsepower 350 L48 Base Engine
3997771	Cast Iron	190 Horsepower 350 L48 Base Engine
3997771	Cast Iron	250 Horsepower 350 L82 Engine
353015	Cast Iron	275 Horsepower 454 LS4 Engine

1974 Intake Manifold Casting Numbers

340261	Cast Iron	350 Cubic-Inch L48 & L82 Engines
353015	Cast Iron	270 Horsepower 454 LS4 Engine
336789	Cast Iron	270 Horsepower 454 454 Engine

1975 Intake Manifold Casting Numbers

350 Cubic-Inch L48 & L82 Engines

1976 Intake Manifold Casting Numbers

350 Cubic-Inch L48 & L82 Engines

1977 Intake Manifold Casting Numbers

350 Cubic-Inch L48 & L82 Engines

1978 Intake Manifold Casting Numbers

346249	Cast Iron	L48 Engine
458520	Aluminum	L82 Engine

1979 Intake Manifold Casting Numbers

14007376	Cast Iron	L48 Engine
14014433	Cast Iron	Late Production L48 Engine
458520	Aluminum	Early Production L82 Engine
14007378	Aluminum	L82 Engine

1980 Intake Manifold Casting Numbers

L48, L82 & LG4 Engines

1981 Intake Manifold Casting Numbers

190 Horsepower L81 Engine

1982 Intake Manifold Casting Numbers

200 Horsepower L83 Engine

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