Description: 

• HP & Torque: 260 HP / 342 FT LBS
• Gain of up to 50 HP and 42 Ft lbs vs Factory.
• Compression Ratio: 9.2:1
• 1987-1995 GM Iron Heads
• Hydraulic Roller Cam
• Steel Crankshaft
• Hypereutectic Pistons

Block:

• NEW BluePrint Block
• 4-Bolt Main
• 4.000" Bore
• 1-Piece Rear Main Seal
• Mech fuel pump provision: Yes
• Passenger Side Dipstick
• Drilled and tapped for clutch linkage

Rotating Assembly:

• Steel Crankshaft
• 3.480" Stroke
• Forged 5.700" connecting rods
• Hypereutectic pistons
• Internal Front/ External Rear

Cylinder Heads:

• 1987-1995 GM Iron Cylinder Heads 
• 64cc chamber
• 1.94" intake/1.50" exhaust valves

Cam Specs:

• Cam Type: Roller
• .447 Intake .459 Exhaust
• 201 Intake / 208 Exhaust duration
• @ .050 - 117-degree lobe separation

Ignition Timing:

• Controlled by OEM Computer

Also Includes:

• New valve covers
• Oil pan
• Timing cover
• Harmonic Balancer

Notes:

• Not for use in pollution-controlled vehicles.
• Tested in a factory equipped 1987-1995 oem 5.7 truck with factory torque converter, fueling system, and ECU, while using 87 octane fuel.
• Designed as increased horsepower, factory style long block. Customer to re-use existing intake manifold, ecu, and fuel system from 87-95 350 truck engine. Excellent upgrade for an 87-95 truck, gaining Roller cam, 4 bolt main, and horsepower, otherwise retaining OEM components, such as torque converter and exhaust.