67Dart273 is probably right, since I don't see the rectangular Vreg in your photos. I assumed your 70 Duster had one because my 69 Dart did. Maybe the Rally clusters, being low volume, were on a longer redesign cycle. Indeed, your fuel gage looks like the one in my 65 Dart, with the long pin sliding in the copper tower. If you have internet while on your trip, look up the IVR Vreg on ebay that others refer to. They have a great explanation with photos showing how to bypass the one in your fuel gage and installing the modern one. As others, I did not bend the arm back in mine, but just slipped heat shrink over it to disable it.
