You'll want a 92-95 V8 engine harness/computer. Auto or manual trans computer won't matter. The 95 and earlier is OBD-1, and the wiring harness is 20x simpler than a 96+ OBD-2 harness. I put a 99 dakota 5.2 into my 88 Jeep Wrangler. I used a harness out of a 95 grand cherokee and manual trans ecm out of a ram (because my jeep was a manual trans, plus the cherokee ecu would not work because it had security). The OBD-1 harness is fairly easy to dissect, the engine harness portion is very self contained, there's only 3 or so wires from the engine harness that you have to mate with your stock wiring. I did have to swap over the engine sensors from the 95 onto the 99 engine and drill/tap the 99 engine for an intake coolant temp sensor that it did not have.