Advice Needed - Can't Start Rebuilt 273

Update Saturday Afternoon:

I want to sincerely thank everyone for the helpful suggestions - especially the one about working on it after midnight shifts :) Actually, this is just a hobby so it's something I (usually) enjoy doing between work shifts if I keep the frustration in check.

OK, TDC and distributor position are no longer an issue. All of the many pieces of advice tend to be a little confusing sometimes (especially after working all night, lol). I had the distributor right the first time (when it ran a little), but reversed it 180 out yesterday. Today I used the wire-on-the-powerstroke method. Put the distributor in correctly. Adjusted all of the valves correctly using a Mopar chart, moving the crank 90 degrees at a time. Re-checked the firing order and re-checked that spark was getting to the plugs.

It now seems very close to starting. There is no more backfiring or puffs of fuel spitting out the carb. It's kicking over like it wants to go. I keep trying and pausing, adjusting the timing in small increments to find the best spot. I think I have it close now but I finally ran the battery too low and probably flooded the engine again as well. I am letting it charge up and will probably try it one more time before I have to go to bed.

~Bruce