thanks for the education... always thought 2bolts were not so strong. No n2o...of course that would have been the easy route... I think of it as cheating. I'll have to trust the machinist to do the job right... engine builder is trustworthy and touts building them right and claims his engines don't break because of it... he built the motor that was top qualifier in quick 16 here last year at 7s flat, of course the driver/owner got banned for life from the track for duking it out with someone in the pits...

what special precautions to take with the valve springs? should use weaker springs for cam break in but then I need to break in the new springs? Easy revs varied around for xxx miles or xxx minutes?