Thanks guys! Sorry my original post was sorta vague. I am looking to get my Belvedere into the 10s without adding a ton of low end. My 500ci I built a few years back was the ticket if the track absolutely perfect. But if not it would blow the tires off and go no where. I bent 2 rears and switched back to my 12.0 383. Now that's it's time to rebuild the 383, my engine guy purposed the 440 crank to help move the heavy 3800 lbs Belvedere. I was wondering how many people are using this and how durable they are? Also what for Ets, 60 foots, stall of converter, etc? Things along those lines. Id love to see the car go 10.50 but if it goes 11 flat and doesn't spin I'd be happy. Just looking consistency and a reliable piece to bracket race. I want to stay with 383 because the block is perfect and the added cost of starting with a new block.