Thank you for the advice on new pistons. Not really too hip on rebuilding this engine. I wasted a lot of my time and others here with the bad data because I wasn’t getting the degree wheel zero correctly. Now that the head is off I can focus on figuring things out with accurate numbers. I may have to order a new cam that will fit at least, But being that one head is off, wouldn’t be too much trouble pulling the other and replacing with something that works well for everyone, 270’s. I have all the parts now for the 572 Hemi and it will be the last engine I build. This one just needs to get thru 3 or 4 more seasons. You would think a 511 with 12.5:1 compression and a head the size of the Victors would make 700hp easy. Mine don’t. Another guy over on B Bodies has the same set up , a 512 with same heads, but 13:1 and a big roller runs same times I do, maybe a 10th better. Still searching for a head that fits my combo. Thanks for all your time guys.