8 Cylinder
8-Cylinder GM Cylinder Heads |
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| 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 |