Total Rebuild of a 1979 Dodge Class C

Best thing to do is totally bypass the old mechanical fuel pump. What I did on my Scout II was to mount the electric fuel pump near the gas tank and send power to it from a three position toggle switch. One position was spring loaded and I used it for priming the engine. The center position was off and being unlabeled, a thief could only drive as far as a carb full of gas would allow. He would then have to know that there was an electric fuel pump and then find the switch among all of the others in the cab. The third position was run and ran through an oil pressure switch in case of an accident. It worked an when an idiot thought he knew how to drive in snow with his 4 wheel drive hit the lady in front of him and spun out in to my lane. He forgot that 4 wheel brakes were invented long before he was born. Anyway, the accident broke the oil filter off and dumped my oil; the engine quit and would not restart. My wife who was in the passenger seat said I was bound and determined to start the truck and pull off the highway. I do not remember anything for 14 hours of that day. Anyway when I got to look at the wrecked explorer and my scout I drove the Scout into the barn after fixing the oil filter. The explored was never going to move under its own power again.