New Eagle Cast Crankshaft, 3.75" Stroke, 3.00" main, 326-400 Block, 2.250" Pontiac RJ

Cast crankshafts are an excellent alternative to O.E. Cranks. These crankshafts are new cast pieces made with modern material and casting processes to be a great alternative to 30 year old factory cranks. Recommended for use in street engines without power adders. Many factory cranks we check have stress cracks, so even though your crank has not broken yet, you may have a problem developing that could destroy your engine.

Clearancing for counterweights may be needed in some blocks. May need extra clearancing when used in 557 blocks.

Counter weights setup for balancing with aftermarket/lighter rods and pistons. Heavy metal may needed for the heavier stock rods/stock type rods/stock pistons.

The Butler Process

All rotating assemblies sold by Butler Performance, regardless of brand, are balanced in our shop by our experienced machinists.

We don't take anyone else's word when it comes to the parts we stand behind. We put all rotating assemblies through the Butler Process for quality and performance. Our internal balancing process ensures each part of the kit is put through a multi-step inspection process. We then weigh and pin fit the rods and pistons as needed. We computer balance the crankshaft to the rest of the assembly. This process ensures that all the parts of the assembly are matched to form a "Butler Performance" worthy assembly. We then document all weights and information on a balance card that ships with the assembly.

We also offer services to balance crankshafts to your Bob Weight.