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" ...Ford Sensor 01A-10990 ..."

I looked at one of these too, but in my F-134 the thread was the wrong size and the bulb was too big for the hole in the cylinder head. It looked like it would...

The 1948 and 1949 trucks use the same fuel gauges and sending units. I have a similar issue with the ’48, but I suspect mine is because the float is improperly adjusted in the tank. That is going...

I'd suggest you read the three links in the email in this link, there is good info about fuel gauges in general there - even though it applies to CJ 2A's..

The set screw is not there on all CJ...

These may give you some ideas to check out:

https://www.thecj2apage.com/forums/why-doesnt-my-gas-gauge-work_topic17875.html

http://www.cj3apage.com/cgi-bin/3Ayabb26/YaBB.pl?num=1429482195
...

The basic circuit is a variable resistor in series with the gauge. Less fuel, higher resistance, lower reading on the gauge. More fuel, less resistance, higher gauge reading.

But, before we can...