Is it time to take your Pre-1980 GM truck to the next level. We have a solution with the big-torque HT383 crate engine. The displacement gain and unique parts were chosen to guarantee a wide, flat torque curve that will supply at least 400 lb.ft between 2,500 and 4,000 RPM. The engine starts with a brand-new block with four-bolt main caps – a strength-enhancing feature most production truck blocks don’t have. The crate engine includes: a forged steel crankshaft, heavy duty PM steel rods, hypereutectic aluminum pistons, smooth hydraulic roller camshaft, iron Vortec heads, and aluminum intake manifold. The 9.1:1 compression ratio is perfect for regular gasoline at all altitudes and engine loads. Ready for you to swap over the accessories from the tired SBC. It is also backed with a 24-month/50,000 mile limited warranty.
| Engine | HT383 |
| Horsepower | 323HP @ 4200RPM |
| Torque | 444FT/LBS @ 3000RPM |
| Compression Ratio | 9.1:1 |
| Block | Cast iron with 4-bolt main caps |
| Crankshaft | 4340 forged steel, 3.800" |
| Heads | Vortec iron with 64cc chambers |
| Valves | 1.94"/1.50" |
| Camshaft Lift | 0.431"/0.451" Hydraulic Roller |
| Dur. @ 0.050" | 196°/206° |
Fuel Pump and Flex Plate no longer included!
