Help understanding my odd timing?!?!

we swapped it 180 and it back fired through the carb, so we felt it was correct the other way. The balancer is fresh with about 2000 miles on it. It is a professional products balancer but it ran fine before we pulled the motor and the motor was not touched before reinstalling it. It just seems like there is something keeping it from firing? I know we have had the dist positioned at some point where it should fire! Stupid thing! (watch it will turn out to be something stupid!)