A local radiator shop guy here told me he would boil out my tank at a cost of $100. Removing and replacing the tank isn't hard. It isn't very heavy. The heaviest part is the gas itself. Siphon it out. Jack up one side of the vehicle so all the fuel will be in one end and then siphon it. The radiator shop guy said I'd have to leave it for a couple days and he guaranteed it would be shiny clean when he was done. You can also buy the chemicals to eat out the rust yourself and line the inside. I've heard both good and bad about the liner material. If it comes detatched from the tank then you're screwed all over again. That entire do-it-yourself kit costs $50 and then you've got to do all the work and then dispose of the chemicals. I didn't want to deal with that. I got lucky. There was a 72 just like mine in the salvage yard that I had been pulling parts out of all last summer. The tank was spotless on the inside. It looked brand new. I got lucky. It cost me $55.

Your fuel filter hangs down from your fuel pump. What engine do you have. On the 360/390, the pump is just in front of your dipstick. The filter hangs off the bottom in a little canister that looks somewhat like a small oil filter. You just twist it off with your hands or whatever it takes and the filter is inside that. They're $2-3 to replace. The problem with rust is that it can get into and ruin your pump. What I did was disconnect the dizzy so the truck wouldn't start, pulled off the filter, and turned over the engine and watched from underneath until clean fuel came out of the pump.

 

I have a 302. I know where the fuel pump is, but there is no filter and I don't see where one could go.

Thanks for the info about the tank. I had thought it would be a lot more expensive.

 

I think you can buy a new tank from lmctruck.com or dennis-carpenter.com but I think they're around $200 with shipping. And I'm like you. I didn't think $100 was too much. Get it done soon. It will save you tons of trouble.

I don't see how you can't have a fuel filter. My neighbor has a 70 F100 with a 302 and it has the exact same fuel pump/filter as mine. Are you sure you have the fuel pump figured out? The pump should have a fuel line coming into it from the tank and the other heads out of it and goes straight to the carb. From what little I know, you should have the small cylindrical canister hanging down from the fuel pump. It unscrews and the filter is in there. Unless you have some sort of aftermarket pump.

 

Yeah it seemed weird to me too, but I've looked at the fuel pump and the carburetor. Nothing. Could there be an inline between the fuel pump and tank somewhere on the chasis?

 

I have only seen my fuel pump/filter and my neighbors. They're not exactly the same but they're functionally the same. His has a different shaped pump arm on it but everything else is the same. You must have a different type of fuel pump. There could be and should be an inline. If there's not you can add one. It only takes about a minute to figure out the fuel flow from tank to carb. All you would have to do is cut the rubber line down low and put in a cheapo little plastic inline filter. That would be better than nothing.