Head gaskets don't just leak into the water jacket. It could be losing compression into the exhaust manifold. You also might have burned exhaust valves or broken valve springs causing low compression.
Thanks!! I`m pricing leak down testers and their quality. Renting too. Would my spark plugs give me a clue?
~ BD. "You won't find me in an old folks home" Pioneer Florida Cracker 1958 Apache Stepside 1958 Apache 1/2 ton Panel 1959 Apache 1/2 ton Panel