Fuel Gauge Problem

#1 Solid state regulator on your guages. MA covered one eons ago, or you can buy them now.

#2. Check resistance at the sender, sender installed.

#3. Check resistance all along the sender wire. Resistance is resistance and it doesn't matter if it occurs at the sender or at that break in your 40 year old insulation.

#4. Mine, and obviously many others, have the same Year One origins and similar issues. I think I just need to bend the float arm if the resistance checks OK. This was not an issue prior to the new 3/8" sender, so I highly doubt that the needle is warped. I'd say it's rooted more in the cheapass parts from China that are infiltrating our hobby.

#5. Motorcycles don't have fuel gauges, Mopars don't typically have tripmeters or reserves, so you get to split the difference.
a.)Toss a 2 1/2 gallon fuel can in your trunk. Go fill up your gas tank AND fill the 2.5 gallon gas can in your trunk.
b.)Write down your odometer reading. Go for a drive. Mix it up, city n' highway. Try to make it a NORMAL drive for the way you drive, but go until you're out of gas. Literally...side of the road, stalled. (This is where your gas can in the trunk should come in handy, but first....)
c.)Make note of your vehicle mileage. This is your "range". Knock 30 miles off that, and write/memorize/record your mileage at each fill-up. Getting close to your range? Time to fill up!