You can use a 92 Dakota wiring harness to wire the fuel unit on a Magnum 5.9 3 wires to connect. There's a thread in the tech archive I think. A member here named Scott [NFury8] has done this swap with a 2 pin 518 in a 69 W series CrewCab. Autometer sells a speed sensor that allows using the mechanical speedo. I'd use a Magnum engine either way
