I am considering buying a 454 LS-7 Crate motor from this guy. The part # on the valve cover is 3965775 and there is a date also printed there of 2/23/73. He claims that he bought it new from a local chev dealer. The problem that I have is that this motor does not have aluminum heads in it. He swears it has never been touched. He also says that there is 12.25:1 compression and that it has a radical solid lifter cam. That info checks out. (Almost) From what I have read, the LS-7 was the same as an L-88 but with more horsepower. Can anyone tell me for sure (maybe from this part number) what this motor is and what it is worth? Or, at least, exactly what the specs are on an LS-7 Crate motor, including the true horsepower ratings. Thanks so much for all the great info! PS I am using my wife's email acct until I get mine up and running. Sorry about the confusion.