Piston recommendation for 340

Pay close attention to the weight of the piston. The KB hypers are light. A regular stock replacement piston will be heavy. Heavy pistons means slower revs and more stress on bottom end. And hypers pistons will be plenty strong for what you are doing. You could probably get the .018" shaved off the top of the pistons to zero deck them if you want to go with closed champber heads. But J heads or any other 360 stock heads will get you what you want. Here is an article on a nice 340 build:

http://www.compcams.com/information/Articles/Type/Chrysler/CC_MM0201-001.asp