I think the pump is located in the fuel tank on those cars. You'll have to drain the tank, disconnect the filler hose, unbolt the 2 bolts that hold the tank straps to the frame, then lower the tank enough to disconnect the wiring and fuel lines from the top of the tank. (You'll need special duck-billed adaptors to disconnect the fuel lines. The pump is held in with a circular ring, which can be turned with a brass punch and a hammer. Lift out the pump with the sending unit, attach the new pump and reverse the disassembly procedure.