to tell you the truth, thats the exact phrase i got from the guy i bought the engine from - the it being ready for boost part - because it was previously turbo'd. so i couldn't tell you . i said it is safer to put a turbo on this, then just stock because i sure as hell wouldn't run a turbo on a stock clutch, and you don't have to get a tapped oil pan, or have to get it tapped... etc. its not a built engine - or i would have said that.