Fuel Gauge wiring (rewiring to fuel cell)

No, 0-90 is not Mopar. I'd measure it and see what you actually have. If you can get it close to the 10-74 ohm Mopar range, there's a device you can buy for about 50 bucks called a meter match that allows you to re-calibrate it at several points

The OTHER thing is..........does it go the right direction? If it's 0 at empty and 90 at full you are screwed