Another thing to consider is the extra life added to a motor with a center weighted crank, which evens out the stress on the main bearings and webs, along with the crank itself. I run one in my 528 drag motor, and though expensive it was worth it. I had cap walk in a megablock, and the center weighted crank eliminated it from the # 2,3,4 mains. Add to that a better main cap and studs and I bet a stock block would tolerate more power than most would think.
