Chevy V8 Small Block - 265/283/302/307/327/350/400 Engines; and Race Engines
Part #	Cyl. Head App.	Notes	Use on 400 Race Engine?	Steam Holes for 400 Eng. Street Use?	Use on Alum. Block w/Liners?	Gasket Bore	Nominal Comp. Thickness	Price/ Each
1003	Cast Iron or Alum.	-	Yes, only up to 4.155" max bore w/minimal chamfer.	No	No	4.166"	.041	$44
1004	Cast Iron or Alum.	-	Yes	No	Yes	4.190"	.041"	$42
1010	Alum. Only	Recommended for 1986-91 Corvette w/Alum. Cyl. Heads	Yes, only up to 4.155" max bore w/minimal chamfer.	No	No	4.166"	.039"	$49
1014	Cast Iron or Alum.	Also suitable for marine applications	Yes	Yes	Yes	4.200"	.039"	$42
1034	Cast Iron or Alum.	-	Yes	No	Yes	4.200"	.041'	$49
1036	Cast Iron or Alum.	Extra large bore.	Yes	No	Yes	4.250"	.051"	$79
1043	Small chambered Alum. Race Heads and some Vortec Engines	Will NOT fit conventional OEM-type combustion chambers.	No	No	No	4.080"	.039"	$49
1044	Cast Iron or Alum.	Extra thick to reduce compression piston-valve clearance problems.	Yes	Yes	Yes	4.200"	.051"	$59
1045	Cast Iron or Alum.	For severe duty such as Nitrous or turbos. REQUIRES PRECISION RECEIVER GROOVE MACHINED HEAD. Also suitable for marine applications.	Yes	Yes	Yes	4.180"	.039"	$85
1074	1992-97 LT-1 and LT-4 Only	Used in late-model Corvette, Camaro, Firebird, Impala SS. Also suitable for marine applications.	N/A	N/A	N/A	4.125"	.039"	$42
1041	1997-2003 LS-1 Only	Used in late model Corvette, Camaro, Firebird.	N/A	N/A	N/A	4.135"	.041'	$72
1094	Cast Iron or Alum.	Use in some Sportsman drag race and Flat Top piston oval track categories.	No	No	No	4.100"	.015"	$25
1142	Cast Iron or Alum.	PermatorqueMLS design	Yes	Yes	Yes	4.100"	.040"	$79
1143	Cast Iron or Alum.	PermatorqueMLS design	Yes	Yes	Yes	4.165"	.040"	$79
1144	Cast Iron or Alum.	PermatorqueMLS design	Yes	Yes	Yes	4.200"	.040"	$79