Well, the problem revealed itself friday night as a blown head gasket! <img src="/forums/images/graemlins/barf.gif" alt="" />
Its weird, when the truck was cold fri night, it ran like it would with a blown HG, rough, puking white smoke, then as the truck warmed up, the white smoke went away... I guess the heating of the metal closed the gap in the HG.

oh well thanks anyway