RPM Airgap vs. non-Airgap?

I always leave the exhaust crossover open, yeah I tryed it the other way but unless its over 70 I feel its better to have it. Now under the carb I have a spacer that keeps the carb cool. Even after the motor sits when hot after you drive it the incoming air cools the carb off.

OH and scince I gotten a MSD 7al box and 8251 coil theres no need for any type of warm up even now at around 40 degress. Motor starts up and idles in gear-rough but a good idle-I just drive it for 5 mins. and its ready to kick but again. Best $550 I spent I believe.