Choke adjustment?

I hope this is in the right place. I have a 1973 Duster 225 /6 904 TF. All stock. It starts up great in the morning, but if it sets for a couple of hours, its hard to start, I must remove the air cleaner lid and physically open the choke butterfly. Help, it blows my cool in front of all the ladies that I try to impress with my car...
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