Boy, didn't know there would be a fight over a simple question. To answer a couple questions, yes the car runs better cold. I have driven it on the street but only put about 150 miles on it. As far as ring break in, there are half a million opinions on how to break in molly rings. I did the 20 - 30 minute cam break in and have done various driving from just cruising to full on wot. Maybe the rings haven't seated yet, but it seemed odd that compression would drop when hot. It seems to go against the law of physics. As far as the cylinders go, it was bored .040 over, brought home from the machine shop and assembled. The heads were milled .006 to true up a .005 variance found from end to end. The valves were checked by the machinist and reground accordingly. Valve guides were also checked and reconditioned or replaced accordingly. Anyway, I will perform a leakdown test as soon as the tester gets here. Thanks for trying to help.