440 pistons Help

You could go with the KB Hypers, the 237s are pretty much a dead ringer to the 2355s, but the TRWs are forged, so there alot stronger (but heavy), for the extra 50.00 or so, i'd go with the TRWs, there plain "bullet proof", quench is the area from the combustion chamber & TDC, you basically want .040"/.042" between the 2 areas for best quench if that makes sence, this is best achieved with closed chambered heads, not open, so in another way, the top part of the piston & the bottom part of the head, not the area of the valves, when the piston is at TDC, theres around .042" between the 2 areas, this gives the best control of the burn, thats how i can explain it, maybe someone can give it to you in a better term, i'm not that advanced lol, but it makes sence to me.