Need help diagnosing

[zac0002]

I have a 1967 that is just Frankensteined. This project began about thirty years ago. It was supposed to be a gift for my mother when she graduated highschool. However my grandfather was screwed out of a deal and the truck was never put back together. I have put it back together by myself with little to no knowledge of engines. It is almost complete and have the engine firing but not running. I have checked the fuel line and nothing is clogged. What is happening?? Timing is good as well as distributor in correct position. Transmission neutral. Correct spark plugs. Wiring good as well. I'm at a loss here...