It's frustrating how this guy is not answering ANY questions pertaining to this motor. I personally do not believe this motor is 540 inches. There are a couple of clues that I am going by. It looks like a standard deck GM block with GM heads and head bolts. I don't think that anybody in there right mind would go through the trouble of building a blown 540 without atleast using some sort of aftermarket head. Head studs are a must also. YOu can not get 540 inches out of a gm block either.
If this IS a legite deal, then I apologize, but It seems shady to me at this time.....
BUYER BEWARE!!!!