8 Cylinder

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8-Cylinder GM Cylinder Heads
Liters	CID	Description	HP	Cyls	Head Casting Numbers	Part Number
5.0L	305	7 Bolt Exhaust. Early Style. Valve Covers Bolt Around Perimeter. 1.720 Intake Valve.	200 & 230	V-8	513, 450, 416	H6015A
5.0L	305	Heavy Casting. 6 Bolt Exhaust. Early Style. Valve Covers Bolt Around Perimeter.	200 & 230	V-8	434, 741	H6015
5.0L	305	1.840 Intake Valves. 7 Bolt Exhaust. 3/8 Inch Temperature Sender Hole.	200 & 230	V-8	450, 416	H6016A
5.0L	305	1.840 Intake Valves. 7 Bolt Exhaust. 1/2 Inch Temperature Sender Hole.	200 & 230	V-8	450, 416	H6016
5.0L	305	Tall Valve Cover Rail. Valve Cover Bolts Down Center. Vortec Head. Slotted Push Rod Holes.	200 & 230	V-8	187	H6017A
5.0L	305	Tall Valve Cover Rail. Valve Cover Bolts Cown Center. Non Vortec Head. Round Push Rod Holes. Must Use Rail Rockers.	200 & 230	V-8	081	H6017
5.0L	305	Vortec Head. Has 8 Bolt Intake.	200 & 230	V-8	520, 059	H6018
5.7L	350	1.9375 Intake Valves. Gasket Plug. Valve Covers Bolts Around Perimeter.	260	V-8		H6021
5.7L	350	1.9375 Intake Valves. Taper Plug. Valve Covers Bolts Around Perimeter. Non Rotator.	260	V-8		H6022A
5.7L	350	1.9375 Intake Valves. Taper Plug. Valve Covers Bolts Around Perimeter. With Rotators.	260	V-8		H6022
5.7L	350	1.9375 Intake Valves. 6 Bolt Valve Covers Bolt Around Perimiter.	260	V-8	882	H6024
5.7L	350	Tall Valve Cover Rail. Non Vortec. Valve Cover Bolts Down Center. 1.940 Intake Valves. Tapered Intake Ports.	260	V-8	882	H6023A
5.7L	350	Tall Valve Cover Rail. Vortec Head. Valve Cover Bolts Down Center Of Head. 1.940 Intake. Square Intake Ports.	260	V-8	083, 193, 217	H6023
5.7L	350	Vortec Head. Heart Shaped Chambers. Rocker Bolts In Center Of Head. Has 4 Intake Bolts Per Side.	260	V-8	906, 062	H6013
7.4L	454	Taper Plug. Small Oval Intake Port Head. With Rotators.	330	V-8	045, 360, 039, 416	H6031
7.4L	454	Taper Plug. Large Oval Intake Ports. With Rotators.	330	V-8	781, 049, 186	H6032
7.4L	454	Gen V Head. Oval Combustion Chamber. Exhaust Crossover. Standard Marine Replacement.	330	V-8	156, 932	H6033
7.4L	454	Heart Shaped Combustion Chamber. No Exhaust Crossover.7/16 Inch Mounting Holes In Heads. L29 Head	330	V-8	279	H6036
7.4L	454	Standard Marine Replacement.	325	V-8	191, 409, 100, 783	H6035
8.2L	502	Early Style 502 Standard Marine Replacement. Large Square Intake Ports. R And R Only.	360	V-8	088	H6037