It was the plugs.

Ran good under throttle but had a miss just running down the road. I changed 1-4 first. Those plugs looked ok and the miss was still there. 5-8 all had a rusty colored build up on them. Swapped them all and the miss is gone.

Ran it up to 60 mph for about 4 miles and she runs and drives fine. Took my buddy up into the pasture to show him around and had run in 4wd most of the way. My cousin has been feeding cows at the back of the place, so the road in and out was rutted and muddy.

Got the rear tank put back under the bed. Blew the fuel line to the front of the truck out, and hooked it to the tank. I need to order new filler hoses. The tank is from a '73 F-100, and the hook-up is right backwards from the filler neck on the '78. Reckon this gonna be a problem? Not sure yet how much room I have to cross the hoses to get them hooked up.

I am well pleased with how good everything is going so far on this project. I like the truck!

Mitch