Rebuilt 273 - starting for the first time! Help!

Hello - new to the site! This will be my first post so bear with me! Setup is a 1966 barracuda 273 two barrel. Auto trans. Just had the engine rebuilt by a local mechanic. Story is that the 3-4 week job turned into a 5 month ordeal (hard to get him motivated). I wound up calling it quits and picked up my car a few days ago. The process was about 95% complete. The only thing left to do was wire it up and fire it up. I referred to some old pics I took of the engine to wire it all up. Basically right now I have the car cranking. It is not getting fuel, and the only way fuel it is the pour some gas down the carb. When I do, it gives me a few backfires and then nothing, just keeps cranking. Not completely sure where to go from here. I turned the distributor 180 and it didn't even give me a backfire so I figure I had it right the first time and turned it back. Help! If I'm missing any info let me know! Thanks guys!