Back to the machine shop...

If I calculate it with the .022 steel shim gaskets I have the quench will be at least .055 and that is too much for my cam.
You are picking the fly poop out of the pepper. There isn't a single horsepower or any detonation resistance if you can get to .050. You can just buy thinner head gaskets from Cometic. No reason to get anywhere near. 035.