Not sure how the fuel lines are on these years but on mine I was not getting any fuel to the carb either I checked the pump and it all checked out, all the lines were clear but I replaced them anyway. The problem ended up being the short length of flex hose that runs from the end of the hard fuel line at the bottom of the radiator to the fuel pump, it got so dried out and cracked that it was letting air in and it was not allowing fuel to the pump. So before you buy a new pump if your truck has this piece of rubber tubing you should check it. Once I replaced it I just had to put some air to the gas tank to get the fuel to the pump now it pumps just fine.