When building a mild Small-Block performance engine or a replacement for a stock engine, production-based blocks from Chevrolet Performance give you strength, accuracy and peace of mind that can’t be assured in a rebuilt core. And unlike so many of the used cores, nearly all of ours feature four-bolt main caps for extra strength. Each cylinder block is machined to production-spec tolerances and is manufactured to the exact specifications of pre-1986 or 1986-later engines.

Production-Based Block Technical Notes:
• Standard 350 main journal sizes
• Non-siamese bores
• Production-spec cylinder wall thickness
• Lifter valleys machined for hydraulic-roller and flat-tappet valvetrains

383 Bare Block (1986 – Later Style), 1-Piece Rear Main Seal
• Cast-iron 4-bolt block
• 4.004" bore
• Torque plate honed
• Clearanced for 3.800" stroker crankshaft
• Machined for hydraulic roller or flat tappets

 Specs:
Part Number: 88962516
Casting Number:
Deck Height: 9.025"
Lifter Pattern: Standard
Cylinder Wall: Open
Bore Range: 4.000" - 4.030"
Main Bolt: 4
Main Bolt Degree: Straight
Cap Material: Gray Iron
Crank Journal Size: 350
Oiling: Wet
Seal Type: 1 Piece
Max Stroke: 3.800"
Weight (lbs): 181
Max HP: 450
Usage: Street

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