Pontiac GM Pontiac 428 HO, Engine
| Engine capacity | 6,998 cm³ |
| Maximum power (range), hp | 390 |
| Maximum torque, N*m (kg*m) at rpm. | 631 (64) / 3400 |
| Fuel used | Petrol |
| Fuel consumption, l/100 km | 23.7 - 27.4 |
| Engine type | V-shaped, 8-cylinder |
| Additional engine information | Carburetor 4-barrel |
| Maximum power, hp (kW) at rpm | 390 (287) / 5200 |
| Compression Ratio (Range) | 10.75 |
| Cylinder diameter (range), mm | 104.7 |
| Piston stroke (range), mm | 101.6 |
| Valve drive | OHV |
| Number of valves per cylinder (range) | 2 |