Fits On/Installation Notes:
Its extra displacement and unique parts are designed to build a wide, 
flat torque curve that hits the 400 lb.-ft. mark by 2,500 rpm and doesnt 
dip below it through the 4,000 rpm peak (435 lb.-ft.). It also makes 340 
horsepower. Thats power and torque you simply wont get with a stock-
type rebuild. 
The HT383 features a brand-new engine block with four-bolt mains 
 an upgrade for most production engines that came with two-bolt 
mains  along with a forged steel crankshaft and a smooth hydraulic 
roller camshaft. Its 9.1:1 compression ratio allows it to run on regular 
unleaded gasoline, too.