I'm lost. What does it have anything to do with that the pistons need to be forged with a stroker? If they are good quality castings and the ring end gaps are right, you shouldn't have any problem. Just don't run it lean. Personally, I wouldn't buy the thing. I am pretty positive I could put one together cheaper than that with the exact parts I wanted. But if you think it's a good deal for you, then go for it.