73 duster possible fuel problems?

See if you can wiggle the throttle shaft back and forth any at all. While you're there have a look see at the carb on both ends of the throttle shaft. Does it look like fuel has run down the side and evaporated? Biggest problem I've run across with the 1920s is worn throttle shafts. Don't take much wear to start sucking air around the shaft and running like crap...