The Power Adder SBC Short Block comes standard with many features designed to handle high horsepower levels.The Dual 3/16" Keyway option is highly recommended for supercharger applications. The ATI Blower Balancer has both the 3 bolt SBC pattern and the standard 2.80" Chrysler Blower Bolt Pattern & extra thick BBC Hub.  The ATI Balancer requires a matching ATI Timing Cover which accepts a BBC timing cover seal to match the Balancer's larger hub.Compression Ratio calculated with 65cc cylin...

This is the option for street-rodders & racers who already have a good LS block core, but want to upgrade it with new forged internals designed & built for their application! Simply send us your bare block, and receive it back with a fully forged rotating assembly, ready to go! Package Includes: Jet Wash & Clean Your Block CNC Parallel Surface Block Decks CNC Dual Torque Plate Hone Job New Performance Cam, Main & Rod Bearings Smeding 4340 Forged 4" Stroke Crankshaft w/ 58x S...

This LS Power Adder Short Block comes standard with a DART SHP Iron engine block. This block utilizes a 6 bolt cylinder head pattern for extra clamping force to help secure the cylinder heads and head gaskets. It also has billet steel main caps with splayed outer bolts. This greatly increases the strength of the engine block and tightly secures the crankshaft. Please call for additional options or upgrades.Compression Ratio calculated with 68cc cylinder heads Specs:Block: DART SHP Iron, 6 Bo...

The Power Adder SBC Short Block comes standard with many features designed to handle high horsepower levels.The Dual 3/16" Keyway option is highly recommended for supercharger applications.The ATI Blower Balancer has both the 3 bolt SBC pattern and the standard 2.80" Chrysler Blower Bolt Pattern & extra thick BBC Hub. The ATI Balancer requires a matching ATI Timing Cover which accepts a BBC timing cover seal to match the Balancer's larger hub. 383" Specs:Block: Smeding Heavy Duty 4 Bolt M...