QuickTD I checked the timing and unfortunately it was advancing like usual.
I replaced the valve stem seals because I remember seeing oil in one of the intake ports last time I had the intake off. I replaced all but the #4 exhaust seal because I couldn't get to it with my tool while the engine was in the truck. Still smoked so I shelved it for a few weeks until I could pull the engine and replace the last stem seal.
I got the engine out, replaced the last seal and for some reason decided it
would be a good idea to look farther into the engine before I put it back in. Partly because I was concerned with the potential shape of the engine. The previous owner didn't take good care of it.
My conclusion is that things don't look too bad, not great but not horrible either. Didn't find any sticking oil rings like I had hoped but found 2 stuck lower compression rings. I'm tempted to just put it back together but for the sake of 150 bucks I'm probably going to put rings and rod bearings in it just to start fresh. Probably not needed but it will give me some peace of mind.