I don’t know anything about carburetors, but I have a straight 6 258 4.2l AMC with just the stock carb and a manual choke. It takes like 20 minutes to start even at just 50 degrees. I have a 71 Chevy Nova that I’ve had work done to (I don’t know what work) with a V8 350 and a 4 barrel Holley that starts right up, no problem in 10 degrees. Why does it start so easy? Is there some kind of kit that can be installed? There has to be??? I just want the AMC to start right up in the winter. The manual choke sucks!