Ok, search is not my friend today! Simple question, can i swap a 28oz flexplate and harmonic balancer (1973 set up) onto a motor that originally had the 50oz setup on it (1984 shortblock)? Or is there a differance in crankshaft balance? Reason being, i am backdating my 84 shortblock and want to run v belts...i am changing to a 1973 timing cover and front accesories. Just wanna make sure im not going to get a death wobble vibration. Thanks!