Just watched your latest video on YouTube and the Cylinders were certainly getting plenty of oil and fuel. I agree the pistons and Cylinders should be fine. My comes in with the Seizure, if a piston didn't grab enough to stop the engine from turning I don't believe your Camshafts, with the little damage to the Head Casting stopped the Engine. I will log in and see what a full gasket set costs and PM you that figure. A blown Head Gasket didn't cause it to seize either. If you look in the manual I sent the valves are loaded with spacers and they will all be different. Don't take the head apart without reading that section in the manual first. If they ran it hot the Cylinders will still look fine but the rings will have lost their tension. I bought a 175 Eagle engine for my stash for $800 due to that. Great buy for me as I collect 60 Degree engines.