This is a stock rebuild of a 250hp 327 (owned by a friend). The engine only has 100mi on it and it was pulled due to a severe vibration. I can see that the exhaust valves show signs of over heating, but I'm not sure what the deposits are on the pistons. Maybe it's running so lean that it's melting the aluminum? He says the plugs are "clean". He was using Sta-Bil in the gas.
Any ideas anyone?
Verne
