[Mart]

I am sorry, but I have reached limits of my experience on this.
Let's think it through. Normally problems with a cylinder dropping out can be associated with the HT side of things. You have changed the cap and rotor and the problem still seems to be there. There can be problems with worn bushings in the distributor that can lead to a miss on one cylinder, but I have only witnessed this on a 4 cylinder with single points (not Ford).

The only thing I am not too sure about is the mention of a blizzard and also more cylinders not firing properly. Leaving it until next morning probably wouldn't allow it to dry out properly.

I don't really have anything I can suggest, you have tried most things.

Do you know anyone nearby that would be able to loan you a complete distributor and coil off a known proven good running car?

It could be that the problem lies with the carb or a vacuum leak or something like that, and all the shenanigans with the distributor have been a red herring.

I hope you can eventually get to the bottom of it and can post a positive result at some time.

Mart.