This is what it should look like when on correctly.
View attachment 1716064401
View attachment 1716064402
This is the same one but I lifted the needle out of the thermal bimetal hook.
View attachment 1716064403
I used a pocket knife to gently lift the needle back into position.
Perhaps some jewelers tweezers would be better.
The gauges are adjustable for calibration.
One of the serrated parts by the hole in the back sets the gauge low reading and the other sets the high reading.
You will need an IVR, some jumpers, and 3 resisters, 10ohm, 23 ohm and 74 ohm.
There can be a small range to the resistances the FSM has the upper and lower +/-.
If you are not familiar with circuity pm me and we can talk.
There are NOS fuel and temp gauges on e bay from time to time around 100 bucks.
The temp and fuel are the same internals, only the cover is diferent.
also now is a good time to paint the needles. Take 2 pieces of 8 1/2 x 11 paper, cut a single slot on the long side to the center. Make a 1/8 to 1/4 inch hole in the center. Do the same for the other paper..
Carefully open up the slot and position it from the bottom up over the base of the needle.
Do the same with the other piece but from the top.
Now you have a mask covering the gauge face or the insides of the gauge.
A light coat of dayglow orange and your goog to go.