[mepstein]

So have a reputable tech pull the valve covers, check the head studs, adjust the valves and do a leak down. Maybe $500. If the head studs are solid and the leak down is decent, you are good to go. Do the leaks, upgrades and touch ups over time.
Most of all, don’t despair. Everything can be fixed and there are usually acceptable options.

Edit - I don’t know why any ppi wouldn’t include a leak down and head studs inspect. That’s 90% of the engine issues. Without doing those two things, your engine rebuild is just based on a guess.

2nd edit - you can do a head stud inspection in your garage with a jack, jack stand and a 13mm socket. The leak down is a little more involved but if you or a buddy is handy with tools, the internet will show you how to do it. You do need the test rig and a compressor but many people have this in their garage.