Thanks for the ideas.I will check for warpage and try a better quality gasket later. The question is, does aviation gasket sealant help or not?
If you use it, it can be a challenge to pop the head off later. The last head I had to remove (gasser) when the last guy used that great sealant, I had to take out a spark plug and pressurize the cylinder to 130 psi. Made quite the noise.