I thought I was starting a new post about "the good old days" but foolishly made it into a reply to your question, and your first at that. In my feeble defense, it was nearly midnight when I hit enter.
What a rude welcome to DF :frown2:.
Look around here a bit and I'm afraid you will discover your truck may be suffering the same fate as many LB7's... injector failure. While there may be other reasons for your symptoms (coolant in combustion chamber ?) none are easy fixes.