Doing a google search for 93-96 rangers with 4.0 no spark condition results in many threads....
Most of them end up being a ground (corrosion), power wire or grounds for body/battery/engine/computer grounds/, eec relay, crank sensor, coil pack fuse, ignition switch, starter wiring, or the pcm itself?
Since the 96 engine was running before the swap and is not running now I would carefully go over all of the wiring, look at the pins inside the connectors, check the power distribution carefully
Have you decided to run the 96 cam sensor?
Do the injectors pulse on the - side (noid light) when cranking?
Hows the crank sensor? wiring/ pigtail? Did the crank sensor wires get pinched?
Have you visually checked your cam sensor since install? Does it spin when cranking? Do you have a check engine light when you first turn the key?
Thinking out loud here just things to consider when doing swaps and 4.0 ohv stuff
Usually its something simple, something I missed or find when I check my most recent work