273 Engine will not start - Ideas?

I have a 66 Barracuda w/ 273 2bbl - all restored. I had the engine running and seemed to be running well. I had to reset point dwell and timing which I did and the engine was running well and idling good afterward. The engine sprung a leak from a freeze plug after getting up to temp, which I replaced but it took me a while to get it done so the car sat for a long time. I have recently been trying to get it started and it won't start. I have fuel and good spark, the engine does try to start, pops several times but will not actually catch and run. I know it's not ballast resister because the engine never actually runs and then die. One other thing, I pulled the plugs and the left bank plugs had a glaze on them but the right bank did not - glaze appeared to be fuel residue (engine flooded several times trying to start). I cleaned them up but still same issue, will not start and run. Anyone have any ideas what I should be checking?