Well looks like we pressed our luck a little to far on our S/C dragster. Last night at Gateway she went k-boom. Driver said it made a big pop and then sounded like hxxl so he clicked it off and we towed it back. Pulled the valve covers and everything up top looked fine. He said it sounded deep. Can't complain, it's a stock block 500 with almost 600 passes without ever pulling the pan. That stock block probably gave up. Time to build a 572 we've been wanting but putting off. I'll probably be asking some dumb questions to you guy's about any help your willing to give. I'll be using the same B1 Original heads we have. What kind of times can I expect with a 572 in this same chassis. The 500 ran high 7.80's. Thanks for listening to my sob story.