One other trick I plan to try tomorrow, I have a small fuel tank off a riding mower with the outlet on the bottom of the tank. I'm going to hook up a hose from it to the fuel pump and let gravity feed fuel to the pump, and crank the truck over and see if it moves fuel then. If it does then there must a leak some where in the fuel line between the tank and the pump.
If it doesn't pump fuel with this method, I'll do the mirror and light challenge and have my daughter crank the engine.
Thanks. I can't remember ever seeing a lobe for the fuel pump flatten out on these old sixes, but did see one do that on a 350 V-8. But for me at least it is pretty rare.
