512 ci cam

When you get to a stroke that large, if you want to make some power, you need a cam that will feed it. The ususal "050/512" I'd look at is .550-.600 lift (with 1.5s), and around 250° @ .050. If you have power brakes, take 15° off the .050 figure. If you have smallish heads (stock RPMs or any factory iron heads) you may want more lift and duration. I would also not run a hydraulic. You want the solid flat tappet.