Hard to start when stopped

According to this thread I have everything wrong (even A/C, and headers) but I don't have the problem. I think mullinax95 is right about the big aluminum radiator. I do have a BeCool aluminum radiator and electric fan. She will start in 100 degree weather after running with the A/C.

This might help also: I do have a hole in the hood for the scoop, for street use it lets the heat out while stopped. You can actually see the heat waves getting pushed out by the radiator fan. I pull the air cleaner cover off and replace it with a rubber duct for drag racing, but for the street I guess that big hole must really help. So with modern low boiling point gas you have to cool the carb and gas lines somehow.