I am in the process of rebuilding the bootom end of my 1978 401. I have been reading on the net and heard from a couple of people that it is possible to stroke a 390 or 401 with a Chevy 400 6 inch rod. From doing my homework I see that the 401 rod is 5.858" long and I have found a set of Keith Black pistons that is listed as ideal for use with Chevy rods. Apparently you just have to drill out the wrist pins to .9292"? Is this good info and has anybody seen or had this done. I realize that this will be an expensive undertaking, but I am not worried about that. Somebody on another forum told me he wheeled with a guy who had done this and he called it a 445in. AMC and it made like 500 h.p.! Any help would be greatly appreciated.