Well if it is a fiber Gear there is not starting to Go It will just Up and Go Now on the other hand a Alum set may??????? But i dout it. as for a 525 being to much hummmm I ran a 600 on a stock Block/motor No issues. But anyway something to check if your running points Is to check the Points and the condencer. If the condencer is going bad It will run funny/brake up at all rpms But seem to idle fine. Been there Long time ago Before Changeing to a HEI
hope this helps }[oooooo]
God doesn't like ugly.
