Unlikely as 1: the pump size will be different and 2: the electrical connectors will be different. There will be tons of these cars in the scrap yard. get one off the same model and engine type. Is possible some other fiats run the same pump.
dont know though.
As far as I know (Have not looked at a Fiat pump) The sender unit to operate the fuel gauge should be incorporated into the pump housing. You will see the float. If the car has been stood as long as you say then it will be stuck.
As far as I know (Have not looked at a Fiat pump) The sender unit to operate the fuel gauge should be incorporated into the pump housing. You will see the float. If the car has been stood as long as you say then it will be stuck.