I put an '81 bed (with gas tank doors) on my '75 (no doors), and I had to get the fuel filler tubes and hoses off the '81 to make it fit. The tank is in the same place, but the filler tubes are mounted at different angles.
AFAIK, the tanks have always been mounted the same over the years, and if the bed is still in the right place it should line up. The later year EFI side tanks added internal baffles for the pump, but are supposed to be the same size.
On my long bed, if you look through the space between the bed and cab, about 1/3 of the sending unit plug is hidden under the bed, and about 2/3rds is visible. I can see 2 out of 3 fuel line connections. I don't know if that is the same alignment on a short bed.
Bruce