Twin I-Beam to straight axle.
#2
Fabritech might make a kit for that. Most of the swaps like that I have seen have been a complete custom job. Are you going to try and keep the coils or go for leaf springs. Leafs would be best but coils would be alot easier. You could prob reuse the stock buckets and then you would have to fab up some radius arm mounts and then the usual steering, driveline, and brake stuff.