Last night I checked out the engine tempertures with the pyrometer. Hard pressed to reach 160 at dock at high idle. I did locate a really hot spot in the depression between #7 and #8 intake passages on the intake manifold. The paint is even badly "burned" at that spot. The exhaust manifolds seemed consistant in temperture. I did presurize the system and I do have a leak down, I tightened all the new hoses, still have minimal leak.
Are blocked passages in intake manifolds common, can they be cleaned without removing from engine.