Shelby Aluminum 9.5 Block

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The Shelby Alloy Windsor block is 45 percent lighter, yet stronger than the factory cast iron version. It retains original factory engine mounting bosses and bell housing bolt pattern, making it a bolt-in replacement for cast iron Windsor blocks. The Shelby 351 block is fully CNC machined.

The Shelby block offers these premium performance features:

Expanded Water Jackets

Also available as a solid block

Thick 0.750-inch deck delivers the foundation needed for maximum head gasket sealing and retention.

Accepts Canted Valve Heads

Shelby's 351 Alloy block delivers superior bottom end stability at high rpm.

Block Material - A356, T6 Aluminum Block is CNC machined

Deck Height - 9.5-inch

Deck Thickness - 0.750-inch

Cylinder Bore - 4.120-inch. Can be bored to 4.155

Maximum Stroke - 4.275-inch            

Displacements up to - 464 cubic inches

Cylinder Sleeve - Centrifugally cast dry sleeves

Cylinder Wall - Siamese with dry liners

Main Bearing Cap - Billet Steele

Main Bearing Cap Bolt Configuration - studs; 4 splay bolts on 2-3-4 mains

Oil System - Accommodates wet or dry sump oiling systems

Head Stud Diameter - 0.500-inch

Bare Block Weight - 90 pounds, approximately