On the rallye cluster, you could get it even on a 318 2 door. Satellite Sebring could be had with a rallye cluster and a 318.
Well if thats the case than the only reason I see is pressure. Its possible the motors in question had a very high pressure pump and using the resistor wire allows the gauge to read in the normal range. With out the wire I would assume the guage might be pegged at higher rpm's. That's the only logic that makes sense.
I think you are correct. My 71 Hemi GTX had this wire in the original harness. Somewhere along the harness and this wore got cooed.
When I went though the vehicle to clean it up I ordered a new harness and this “resistance” wire was not included. Stock motor with an accurate aftermarket gauge shows around 75-80 lbs. of pressure. The Rallye gauge is almost pegged at this pressure.
