Should have one all broken and mangled up wrapped in duct tape holding a wrench for aircraft mechanic. Had a coworker that would always say at our safety meetings " if it ain't gappin it didn't happen " !
I agree unless you don't know which end of a screwdriver to hold you can change out a head gasket. If you can read the directions and microwave a frozen dinner you can do it. cylinder 3 showed 0 compression i'm thinking maybe a stuck valve. But we still don't know how many miles are on it ?