Are you convinced it is a balance issue and not a misfire? Maybe get it running where it is shaking at it's worse and put a infared heat gun on each header tube to verify they are all firing.
I have found that a long stroke SBC feels differently than just about any other engine, at times I've felt like mine was out of balance as well. I can tell you though now that I have EFI controlling both the timing and fuel delivery...it is buttery smooth everywhere and I didn't change any hard parts pertaining to balance.
Just a thought...
__________________
Lance
1985 Monte Carlo SS Street Car
|