orange or chrome ecu box?

Unless you have 5-pin wiring and dual ballast resistor you can't use a 5-pin ecu. The 4-pin will swap into a 5-pin application but not the other way around.

Just order an ecu for like an 80 Ramcharger and you will get one with 4-pins. The Autozone number for a 4-pin is CR109 vs CR100 for the 5-pin.