Well, Deuce has a failed headgasket (combustion to water jacket). Don't have the head off yet . Inasmuch as when the pressure regulator failed I only hit the overboost switch once I doubt it's related to that failure. Talked to Brian Holms and be believes it will be cracked (the relation of the hot exhaust valve to the water passage making it a certain inevitability). He believes that not allowing a complete warm-up of the engine assures the crack will form. Ya well, even though I live half way up the mountain side the chances that I go up the mountain or down are about 50/50 and even then I don't boost the car up the hill (guess one can never say never, but...).
So will keep you guys posted