Choke driving me crazy!

68F is for s cold start, just barely full closed for prime after depress of throttle one to set linkage. Start should be immediate, the vacuum on choke pull-off immediately opens choke the proper amount, then the bi-spring open choke, and further movement steps fast idle cam towards normal idle.
Following carb setup instruction in proper order typically works well, insure settings are correct for particular vehicle. Correct settings should not require baby sitting of throttle. The engine, should not stall, nor run stinky rich or chugging.

In mild weather an engine should be warmed in in about 1 mile at 40 mph. I find this is true for modern cars too.