Considering those came with V8s, I'd imagine it would be easier than the earlier ones with only flat 6s.
The engine/trans is the easy part anyway. Wiring (old 6V to 12 V), cooling, brakes, rear axle all come into play.
Try forward look forums and the swap info here for guidelines.
The 94 would be a magnum, it may be the best v8 to swap in, provided the intake/carb swap and fuel pump are in the budget. I doubt the stock PCM would play nice if you swapped the trans, although they could be made to work.