442 ci. Stroker

Hey all has been a while since I have posted but I am feeling better and getting through my divorce and the itch is back. My son hurt the 408 so now he wants to build a new engine so i suggested building a 4 1/4 inch stroker based on a .030 340 which i'm told gives you 442 ci. I have been doing some research and not finding much info as to suppliers of the crank rods and pistons. So any help anyone has to offer will help alot.Open to hear all your thoughts pro and con.
Thanks Larry