Guy I'm gonna get on ya a little bit here,just don't take it wrong because I have nothing but the best intentions...
Man youv'e been given nothing but the best answers and advice and thats why I didn't post on this subject. BuTTTT then you come back and tell us your gonna make a stupid mistake and buy your motor from this specialty house,did you investigate this joint ???? what is their warranty policy ??? I do not believe they make their own blocks (ever heard of patents) and I positively do not believe they come with everything as a drop in unit ( But I could be wrong ) Man what happens if you put this thing in and it knocks or blows up do they pull it and fix it for you ???? I'm tellin you this for your own good, Go to any G.M. parts counter and buy yourself a universal goodwrench 350,I'm sure they are under 1500 bucks it has a 3 year 36,000 mile warranty and if any thing goes wrong (except stuff that is your fault) you can take the whole vehicle to the dealer and they will pull and replace or repair it for you under warranty. I'm telling you this with 37 years of experiance turning wrenches for a living. But then again it's your vehicle,your money,and your time wasted if you go the other way and things go bad.....Believe me when I say I have had experiance with companys that have promised the world,and then weaseled out with me holding the bill
when things go wrong.....G.M. will stand behind the Goodwrench engine.