5.9 worth looking at ?????????? from local craigslist

I believe this is a roller cam throttle body injected LA engine or at least that is implied by OP's description of early 90's W series truck, Magnums only came in Ram series trucks, not W series. If it is a TB roller LA, the kegger mods, heads and pcm f;ash dont apply here.
It's the magnum with kegger multi port the seller had the wrong info on craigslist
Serp belt shoulda been a tip-off to us, lol. '92/'93 W250s had Magnums- 5.2 in '2, both in '3.

Were the injector plugs really that different over the years? They all look the same to me. The CPS, IAT, Temp Sensor, CkPS, Coil plugs are very different.