I have found after doing much research and contacting manufacturers and suppliers. All aftermarket sending units are linear. Only NOS for Mopars are the only way to go. You would have to look into reviews on rebuilders to make your decision. I was fortunate to have located an old unit by shear luck. I paid a high price but it's worth it since there aren't many out there anymore. Plus, I threw my OEM one away with the tank not knowing of the overhaul option.