Okay, I'm having an issue that I think it's finally time to address. My fuel gauge isn't working properly. For the best part, it won't backwards, but around 1/2 tank ends up be empty. I just be happy with that normally, but it's not always 1/2 tank. The truck is an 89, but it's changed to carb setup. I want to look at the sending unit, but I dunno wtf I need to be checking for. If I've got it right, the 89 had an in tank pump, and a return line going back to the tank, well I have that... But it has a manual, motor mounted pump, not sure if there's still an electric pump in there, but I sure hope not. I don't know what they did with the return line, because it's hooked up to the sending unit, but there's only one line going to the pump. I'd love to just pull the return line and run an 84 sending unit, but the harness and cluster I believe are still for an 89... I dunno wtf I should do, getting likely 4mpg and have no idea how much gas is in the tank.