Shes alive an shes stayin alive!!

I still think you are after a timing issue, re-check your points as well.
Dot to dot is firing on #6 cyl. dot on top to dot on top is firing on #1.
You could be kicking back through the carb because dist is 180º out or you have a plug wire misrouted. I would not tear the engine down again based on how you said you aligned the timing chain.