Just like fishy68 said....... the balancer on the left is the early style, and the one on the right is what fishy said, 75 and later 360 motor, pre magnum balancer for an externally balanced 360 motor.
Yep, that's correct. Also note that the early 70's and 75 and up balancers have the same amount of weight offset so they will interchange. They are just a different design.
