Right now, it's a new Blue Print 377 Cu In short block with just over 1,000 miles on it. The only "used" parts on it are the distributor, heads (with new valves and seals), and intake. There's no junk in the oil. That was the previous motor.I am wondering how long this engine has lasted with the cam and head change? The OP did not state how many miles are on the engine.
I know this is a long thread, here's where I said I ordered the Blue Print short block...