Titu Performance is a Shelby Carrol Engine Co. Distributor
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.
 
Shelby 351 Windsor Aluminum Block Technical Features:
Block Material
AA356,T6 aluminum Blocks is CNC machined
Deck Height
9.5-inch
Deck Thickness
0.750-inch
Cylinder bore range
Wet - 4.030 or 4.120
Solid - 4.120-inch
Maximum Stroke
4.250-inch
Displacements up to
461 cubic inches
Cylinder sleeve
Centrifugally cast dry sleeves
Cylinder wall
Siamese with dry liners
Main bearing cap
Billet steel
Main bearing cap bolt
configuration
studs;4 splayed bolts on 2-3-4 mains
Oil sump
Accommodates wet or dry sump oiling systems
Head stud diameter
0.500-inch
Bare block weight
90 pounds, approximately