I’ve never really looked into it before....... but it appears as though the 340 seal surface might actually be a larger than the 360 seal surface.

If that’s the case, then the seal surface on the 340 crank could just be turned down to the 360 size.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads