Missing at 2200 rpm???

OK take a look at this buddy. If you have vacuam advance disconect the line and drive it, or run it up in N with the brake on and see if it still misses, then put the line back on, if it is missing withthe line on your distributor has a worn breaker plate bushing. I have seen this many many times, and it is hell with points, but even with electronic ignition messes up the dwell angle and can cause a missfire.

I would say the issue sound more elctrical than fuel related :)