Dram,tell me something new.Why does a stock 360 crank hold 450 hp and not this cast crank?I have never a stock crank breaking but I could be wrong.back to the topic I had one of the cast when they first came out and my block let go before the crank did.After twisting 2 h-beams the crank was still good.i was running 10.50@3400 pound car.if I was building a few motor I would do the steel crank.