Have 302 Ford with shake. Have been told engine out of balance. Crank# 2MAE out of later model Ford put into 69 Ford Bronco rebuilt engine in error. It has one piece rear main seal. What Harmonic balancer and manual transmission flywheel do I use? 28oz or 50? We are getting conflicing info from the "experts". Would it be better to change crank back to 2M or 2MA or try to balance. Thanks.