[Mgs] Miss

[Monte Jane Morris]

I'm halfway into a 300 mile trip and we're at the hotel for the night.
The B is missing intermittently, it seems especially just before upshifting
and going up hills. Runs mostly fine at 70 mph on highway, but ,misses some
at town speeds. During the miss the tach remains steady, so I'm assuming
it's fuel related?. I cleaned the points and dizzy contacts to no avail.
This car has only been driven less than 1000 miles in the last year and
this is the first longer distance highway run. It just started missing
after sitting for 6-8 hours.
Junk in carb jet it does have a filter)? Other suggestions to check?
Thanks, Monte

79B, with HIF's and points dizzy.