FWIW... We ran a stock block 540 with Program caps, good balancer(ATI) on alcohol. Shift at 7000. Had to be 750+hp as it went 7.90 in a dragster. While freshening, it was discovered that #4 main web was cracked. Got a free pass on that one. Aftermarket blocks aren't cheap. But at least we aren't replacing CNC -1 heads!! or the crank...or the rods...or the pistons...or the pan..you get the idea.
or the crank...or the rods...or the pistons...or the pan..you get the idea.