Got the head off finally. Discovered nothing wrong with the gasket but have a pea sized hole in the #1 piston. Suggestions?

Thanks very much! As I mentioned, I'm a novice, so steeling myself for pulling the head. Will keep posted on my progress.

Quick update...just did the compression check again with the engine warmed up...0, 105, 95, 100.

Gentlemen (Ladies), Looking for some guidance please. My rig started blowing oil out of the filler cap so, suspecting a valve problem, I just completed a cold compression check. I came up with the following numbers...0, 100, 90, 92. I'm looking for 'economical' options on how to proceed from...