Originally Posted by Junkman

I would still pull the manifolds off, take care of the turbo drain tube seals, do the oil filter housing gasket(s), perhaps new seals in the turbo. Make sure the oil pan isn't going to leak. Basically everything except where you have to disturb the head. A gasket set isn't expensive and a leak free (old) engine is a joy.

You'll want to keep that truck if only to give it to your kids and 137,000 isn't much from 200,000. Besides, the engine looks nasty compared to that frame. I am by no means one to detail an engine bay but while you have it in your hand....