Not that I am aware of, unless you had it done yourself. I am also referring to 70's 360's not magnums. Like said in my previous post, I can swap out myt 318 for a 340, and use the same flywheel, and in most cases the same damper. I believe the part numbers are the same. If I wanted to get crazy I could put my forged 340 crank in my 318. Or a cast 318 crank in a 340 in combat conditions.