I have a 72 Swinger HT with a /6, 904, and 7.25 rear-end. My son has an 84 D150 Prospector with a 318, 727, and a 8.25 rear-end. He moved out and left the truck with me. It got me to thinking about cannibalization. I got to thinking about taking my drive-train out and putting his in the Swinger...