72 318 Scamp. Low oil pressure 1 minute after startup.

I prefer a gasket... others don't use them. If you use a sealer, it should just be a skim coat.

Both the pistons description and the compression readings say low compression; probably 8:1 or a bit less. Those compression numbers are stock /6-land. No doubt low compression replacements, but the stock 72's would be that low; smog era stuff.