ok guys i have a 84 suburban 3/4 ton 2wd with a 454/400 combo and 14 ff rear end. What all would be involved in turning my 2wd frame into 4wd? i have a donor 4wd suburban frame the rear of the frame is bent, can i take the mounts off the 4wd frame and bolt them on? or should i just look for a 4wd frame to buy? also i wanna use the 454/400 combo but what transfer case do i need? i have a spare 208 transfer case but i dont know if that will bolt to the th400 or if i will need a 203 or 205. Lend me your advice guys.