Thanks for the reply! Definitely good advise on the clay testing, but do you happen to know a ballpark size cam you’d be able to run with these without immediate cause of concern, or is .510 already pushing the envelope? I’m only gonna be able to get one set of head gaskets when the time comes and I’m shooting for that 10.5 CR, if I gotta mill it out it’s gonna throw off the ratio a tad by adding CCs no? Also what’s the best method of tooling to open those up if thats what must be done?