Thanks for the reply.
The engine was rebuilt because of balance shaft failure, I think because of improper chain tension (which resulted in oil pump inoperation=engine failure). The entire cooling system was replaced and is working well. The motor has remained within normal operating temps since I've owned it.

I'll definitely be checking the cam plug for oil leakage but even after pulling the hood, if I can't get a good look at it, I'll probably need to pull the head to know for sure. I'll need to pull it to replace/reseal the plug anyways. Might as well replace it with the non-jet valve head from Clearwater.

Alternator output is beginning to fluctuate with engine RPMs. This is visible in all the lighting at night, and it's worsening. The alternator belt is tensioned properly. Cables look ok, but I'll further inspect before replacing. Thanks for the suggestion.