Evidently we didn't do a proper job of burnishing a new bushing on a race only 440. We installed with a punch and burnished with an old shaft with a drill until it turned easily by hand with a screwdriver. We don't have an installation tool and didn't cut any grooves in the shaft at the time. We pulled the distributor to check the bushing after only 4 passes on the motor and the bushing was bonded to the shaft, spinning in the block.

Can someone give me some good advice as to what to do with this assembled motor to properly install a new MP bushing and prevent this happening again? Thanks in advance.