Now, there may be something wrong with something after standing unused for long. But I would suggest at least initially to assume nothing is fundamentally wrong.
To me, the backfires and the rough idle and the fact that it ran slower and slower and then stalled, is typical for too late timing. And since you redid the points, you have changed the timing, that's unavoidable. So start by connecting a timing gun, set it to maybe 14 degrees. And/or when it's running, have the bolt loosened so you by hand can move the distributor to quickly find where it runs best.
If this works, then you can fine tune, allow me to recommend my book. And if you're in a hurry, I'll be happy to send you the section you need by email.
Just wanted to add, the points have to be adjusted as well to get the proper dwell angle, and that has to be done before changing timing as the dwell affects the timing. Would probably have been easier to start the car and then change the ignition parts later, just for other readers...
