I drive my 56 Victoria every day with its 292 and Holly 450 CFM 4 barrel with manual choke and Fordomatic. Lately on these 20-25 degree mornings It fires right up and drives away fine without warmup with the choke pulled out about 1/3 of the way. Runs fine until I stop at a stoplight after about 5 miles . Gen light starts to flash and I have to do a brake stand to keep it running. Same with the choke in or out.  Idle is very rough. However, after work when the temp is in the 50's it drives home fine and idles fine at stops. I cleaned the plugs and installed a new cap and roter but it didn,t help . I wonder if the petronix ignition after 45000 miles is affected by the cold or if the fuel pump or carb need replaced. Carb was rebuilt about 2 years ago and is not leaking. Any help will be appreciated before I throw more money at it.