[jeffahart]

If you get a GM 1ton corp 14 it should bolt in without changing the perches. You will need to weld in shock tabs. I ended up 5/8" shorter Yoke to yoke with ORD zero rates at the 1" hole. And I think I used Driver side Parking brake cables on both sides. search on 1970 K20 axle swap, I have what I did in a thread. Easy money.