1974 Dart 318 no start

My 1974 Dart 318, 2bbl starts and runs fine provided I start it every day. If it sits for more than a day, it requires a long cranking time, and a couple jabs on accel pedal to get it going. Choke closes fine, choke pull off set to spec, new fuel filter, new carb. But, start it daily, fires right up. Runs perfect. Ideas?