We understand your dilemma buddy. We are just trying to help with the process of elimination. Your saying it gets fuel, and now you've swapped the points you get spark. That just leaves idle and timing(especially if you've swapped the manifold and are not getting excessive air.
So it basically boils down to 2 main points to check and sort, before we get into the nitty gritty of this tiny piece or that tiny piece.

You said it was running ok, the bucked and not doesn't run? Honest truth in all my years of playing with cars, Ive found sometimes the simplest and smallest thing can upset everything..

As another idea too is pulled the spark plugs, and check for fouling..