1. Swap in a XR-7 or Eliminator dash harness
2. Swap in a XR-7 or Eliminator alternator harness
3. Modify the engine bay harness to match the XR-7/Eliminator harness or ...
... Swap in a XR-7 or Eliminator engine bay harness harness
4. change the standard oil sender to the XR-7 oil sender