Missing

72 Duster is supposed to have all new tuning parts. But it has a miss could the box on the fender be going bad. It dont do it all the time and when u call on it , it runs like a scared rabbit. It has a 2bl carb do they have a fuel filter in the carb like some 4bls do. I'm goin to change the fuel filter first, hope that fixes it.
Thanks for any help.