I have been beating on a 572 Megablock for the past 12 years. Race almost every weekend all summer. Probably has close to 1000 passes on it. Also use Nitrous up to 400 hp during heads up events(5-6 a year).I'm sure I am way North of 1000HP during these events.
Still going strong. Bearings always look good on teardown every year.
Block is now 4.53 bore.
Mike