Thanks guys for your advice. The truck was in the shop for almost two years with gas in the tank. I didn't realize it would be there that long. However, I drove it all summer with no problems whatsoever. I checked the plugs and wires tonight. The wires look fine as they are fairly new. The plugs look OK (they were installed with the wires) but I may still change them. The fuel filter is the type which is located at the bottom of the carburetor. Do you know if this filter is still available?