My 67 383 is .060 over, block has been decked, flat top pistons, .105 piston depth in the hole. Engine is at machine shop, and I'm try to pick heads for it. Had 516 small valves on it. I'm interested in RV heads for better cooling, unleaded fuel etc. Do not want to over spend, if that's possible. Looking for someone with 452 heads on their 383 and how they're set up/performed.... Shop said we'll need to go to dome pistons to help keep compression up. Looking into Lunati Voodoo cam 475/494 lift 262/268 duration w/323 gears. Thanks!