For 1987-95 Chevy/GMC 1500 and 2500 Trucks

This two-bolt main block has a one-piece nodular iron crankshaft and powdered metal connecting rods with dished hypereutectic pistons for a 9.4:1 compression ratio. It features a flat tappet hydraulic camshaft and swirl port intake design. The exhaust flange is 7-bolt, and the valve covers are centerbolt. 200 horsepower rating at 4000 RPM (300 ft/lbs TQ) and includes an 8" balancer, 4-quart oil pan, timing cover, and valve covers.

Specifications
Block: Cast iron, 2-bolt main, 1-piece rear main seal
Connecting Rods: Powdered Metal Connecting Rods
Pistons: Dished Hypereutectic
Compression Ratio: 9.4:1
Oil Pump: High-Volume Oil Pump
Timing Chain: Morse link-type
Camshaft: Flat Tappet Hydraulic (Lift .382" Int/.402" Exh; Duration @ .050" 165.9° Int/174.8° Exh; Lobe Separation Angle 111.9°)
Cylinder Heads: 65.3cc chambers, 1.94"/1.50" valves, swirl port intake design (heads are not performance-oriented; intended for good bottom end torque and fuel economy; intake runner is restrictive because it has a ramp cast into the bottom of the bowl to promote high swirl)

Warranty Information