Reply to "Fuel Sending Unit"

I tried rebuilding a few. I also transferred stock senders to larger fuel lines on a few for high-powered engines, since the stock sender fuel line will only support about 450 bhp; the flow restriction causes carbs to go lean above 5500 rpms. If you add an electric in-tank fuel pump, the small stock line works OK under the higher pressure from the electric pump. But then you need a good regulator between tank & carb.
The sender parts are similar to mid-'70s Alfas except for not being exact duplicates. There's a brittle plastic case (2 types) with an access window, a semi-curved wire-wound potentiometer and a long hardened steel arm, along with a few washers and a float. What goes south is usually the wire-wound potentiometer, and even pro electric gauge shops want no part of rewinding one of these. Alfa potentiometers do NOT interchange being wound out of different sized wire which changes the calibration. The floats interchange as well as some (but not all) outer cases and the gasket. The flange that screws to the gas tank is similar but the welded-on support struts inside are radically different for a tall Pantera fuel tank. The Alfa tank is smaller volume and flat. If you had two Pantera senders, you could cannibalize parts but opportunities for a mistake are many. Probably not worth the trouble for $140 brand new.