purchased car 93 with 302 from 79 truck engine, has 2ma crank which is a 28oz and not had any balancing done to crank,, this crank is close to internal balanced,so my question is, it has 50oz balancer and flywheel matched, engine seems smooth ,has cam no hard to tell at idle but while driving its no vibrating, being a 28oz crank will it be ok to keep running?/