Bowtie65; on those trucks just go to what ever side the tank is on;in the rear wheelwells is where the fuel fillpipe is, foward of the rear tires. Take a strait blade(standard flat)screwdriver, that gets the clamp off the hose that goes into the tank. then you can stick it without goin with allsorts off crazy labor.Regards Steve sr.P.S.if it,s a dual tank 79, Do exactly what FATWEED SAID make sure the elec factory changeover valve isn,t stuck inbetween the tanks
