[57taskforce]

I'd ditch that nv 261/263xhd transfer case in a heart beat if I were you. I've rebuilt a few of them and in my honest opinion they are junk. the other problem is that the case will have the wrong front drive shaft drop for your 71 Dana 44. I'd be willing to bet someone has but a np205 behind an Alison but I've never looked into it first hand. The 8.1 will fit just as any other big block swap into a 67-72 4x4. I plan to swap the 8.1 from my suburban into my k/20 when I can convince my wife to get another suburban. Can't wait to see yours take shape.