You'll have to remove the whole instrument cluster, because in order to get the fuel gauge out of the cluster, the bezel and glass have to come off, and that can't come out with the cluster installed.
The cluster is held in by 4 nuts from the back of the dash. And because the temperature gauge has a tube leading from the gauge to the sensing bulb mounted in the engine head, you'll need to drain the coolant down a bit to remove the bulb and thread the tubing thru the firewall. And you'll need to disconnect the oil pressure tubing from the back of the oil pressure gauge. Then all the wiring connections have to be removed from the cluster (amp gauge and fuel gauge, and pop the two bulb sockets out of the cluster. THEN you can remove the cluster from the back of the dash.

Here's a picture of the cluster with the temperature gauge and ammeter removed, and one of the back of the cluster with just the fuel gauge remaining.
Attachments
IMG_2591a.jpg (196.75 KB, 67 downloads)
CLUSTER WITH GAUGES REMOVED
IMG_2592.jpg (369.64 KB, 67 downloads)
REAR OF INSTRUMENT CLUSTER
Mater.JPG (333.8 KB, 67 downloads)



Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.