Why did you open it up? Most I’d have done was throw a chain in it, probably do all gaskets if it was out. You really cant win a game like this. Looks like it needs a basic rebuild and a low comp 440 needs pistons to really do what you want any way. I always tell guys not to mess with a running engine. Most people are way better off adding some oil every so often or a can of restore than doing a tear down without a plan for a full reboot in there.