I just bought a 77 K20 with the cheyenne\camper special package. It has a SB400/T400/NP203 (203 has had the Doug nash part time kit done and warn hubs). The a*s end is a corp 14 bolt limited slip with 1 ton brakes. The front end has an open Dana 44. When I say "open" I REALLY mean open. As in I shattered the carrier which in turn lunched the ring and pinion. Here is my question. I found a used corp 12 bolt front end in a bone yard for the same price the parts to fix the 44 will run me. Is this a simple swap? What if anything will need to be changed to do this swap? Please be specific here. Thankyou all in advance. Clifford.