Ford Big Block Crankshaft

A modified heat treat cycle developed at Callies Heat Treat Department for the Ford Big Block 460 crankshaft produces an optimal microstructure and delivers a  significant improvement in mechanical properties.

The Callies Modified Heat Treat Cycle delivered a noticeable improvement over the as received condition AND exceeds the minimum AISI requirements.

•The as received microstructure did not meet Callies standards.
•The microstructure was improved with a modified heat treat cycle devised by Callies in-house heat treat department.
•The modified heat treat cycle delivered both improved mechanical properties and optimum fatigue resistance.

Callies Racing Crankshafts

If you’re serious about racing then you know how important having the right crankshaft is for a winning season. Callies has racing crankshafts that will fit your budget and your needs. Your high horsepower engine is going to put a lot of stress on the crankshaft and connecting rods and you want to make sure you have the best parts to guarantee you will have consistent, worry free performance all season. Callies crankshafts and Ultra connecting rods are made in the USA and are held to some of the highest standards in the industry. If you’re looking for quality and durability then make sure you call Callies first!