Air gap manifolds in cold weather

I have one on the 360 in my 68 Barracuda and the engine does not like to take throttle until it's warmed up in temperatures below 45 degrees. I have driven the car in 20 degree weather and it can be 4 or 5 miles before the engine does not need to be feathered to take gas. My car is a manual which makes it easier to deal with than an automatic. At 40 and above it takes about a mile or 2 before it's happy.

Even when it's warmed up the choke will some times close down a little and keep the idle up over 1000 rpm after a 10 minutes or so run in 20 degree weather.

Adding choke helps some but not entirely since it's the fuel puddling at the bottom of the plenum that is causing the issue.