This is what i know. 250 HP, Bought at auction, advertised as a Corvette Eng. (arn't they all?) had Corv Valve covers but i'm using them. after the sale an older man came to me and said: "I was with Dave when he bought this engine at a local dealer. we put it in an old car and wrecked it the first week. we pulled the engine and put it in the garage" it's very clean. that is all i can tell you. check the #s, see what you come up with. it's in Canonsburg Pa. 20 mi. s. of Pittsburgh. thanks, mike roman (the junkyard pirate)