There are a few possible problems it might be. First check to see if the fader or balancer is adjusted incorrectly. Then check if your speakers are blown or if there is a short in the speaker lines, and if you still find no problems turn the radio all the way up and connect a volt meter to the speaker outputs on the back of your radio to see if there is any voltage at all coming out and if there is none then it just might be your stereo.
on the tank its a pop out button
Typically, 1 ton fords had either a 351 windsor or a 460.
Have someone crank the engine, while you bleed the injectors,
[the lines that goes to the cyl,s] till fuel starts squirting out at the injectors. Tighten them back up, [only do one at a time] then spray a SMALL amount of starting fluid into the breather,
Slacken bleed screw on top of fuel filter,hand prime the fuel lift pump until air stops coming out of bleed screw,tighten bleed screw. Then slacken bleed screw on fuel pump,hand prime the fuel lift pump,until the air as been bled from the system, tighten bleed screw,crank engine,if it does not start ,repeat performance.then it's bobs yer uncle & fannies yer aunt
Actualy you should start bleeding the system at the fuel filter or the component directly after the fuel tank following the flow downstream. That way any trapped pockets of air do not foul the procedures previouly taken.
I found the problem. It was the battery ground cable. It was corroded at the point of contact with the engine.