Fuel tank sending unit rebuild service

Interesting. I don't daily drive the car so it's no big deal to put fresh gas in every time I drive, it seems to burn a half a tank every time I take it out. I'd like to convert to EFI so I'm looking into ways to convert the tank that I have to an in-tank pump with a return line system. Aeromotive is five minutes from my work, so I'm thinking about stopping by and talking to them to get their thoughts. They make a tank for the 70+ A bodies but not the earlier ones.
mine is a throttle body f.inj., retun line set up, and still burns about what u are getting. When the car starts, I can`t hear the external pump anyway.