I've had several Dakota's, from 89-99, and the only 2 that were OBD2 are my 96 and the 99 I used to have.
I've had an 89, a 90, a 91 (bought as parts truck, had it about 3 days) a 92, a 93,(these both 318) a 94 (3.9, definitely magnum and obd1) a 99(3.9, worst "dog" , underpowered, even for a 3.9) and still have the 96 (318, only 4wd of the bunch,)
The 89&90 were 8' bed, the 94 was reg cab short bed, the rest club cab.