yes he did check the tstat, and the cooling system wasbled fully and properly, he has been a mechanic for gm for a bit so i do believe he know what he is talking about, also because he is a good friend he is not charging for labor either... so i doubt that he really want to tear it down and put it back together again... ALSO again after 2 days of driving the temp is still staying at 260 and no hot air out of the vents... and also now showing low coolant, and when he first started to tear down he did say the rear head was leaking but didnt think it needed to be replaced after seeing the intake... anyhelp appreciated