Phil
I have used both early and late fuel gages with either senders.
The back of the gauge is marked B (battery or soliod green wire)
T for tank or green/black wire.
The green/black wire goes from the gauge to the sender.
Also try a fresh ground wire to the tank. Besides rust, they are mounted 
on a rubber gasket with doesn't help the grounding. I always run a 
seperate wire from a clean tank bolt to the sender screw on the tank.
If you suscpect the sender is bad, drop the tank, the sender is in with 
6 screws, on early senders, you can remove the top, look carefully 
inside at the thin wire from the windings to the terminal, it frys.
With some thin wire (or a single strand from stranded wire) I have 
managed to patch it up. Solder it to the terminal first, then just twist 
it to the thin wire from the winding. The solder iron will melt the thin 
wire (ask me how I know)
-- 
Frank Clarici
Toms River, NJ
The BETTER not BIGGER Healeys
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