Crager SS wheels?/ for 70-340 Duster..

Ok guys, el wizzards of knowledge. In inhearated a 70 340 duster that was my son's. (died of cancer) wanting to finish it to his request. Crager SS wheels.. current tires are P 225-70R 14's. what Crager wheel should i be looking at. second.. suggestions as sight to purchase unless some one has a set that would be good enough for a driver.. thank you.. A dad who wants to finish up his dream... I question if I need 14X 6, or 14x7 wheels, and the correct back space dish... Thank you..