No clue about working on carbs

Is number 40 on this chart the choke thermostat? http://www.carburetorfactory.com/expvw03.html

Everything seems hooked up right, but the only way i can start it is adjust the idle screws and spray carb starter in it.

There were about 6 vacuum outlets on the carb and i used 3 and plugged the other 3. but there is a small outlet about 2 inches long that comes out of the top rear of the carb and i have no idea what it is so i left it alone.....im so sorry that i sound retarded but i have no idea about carbs. thanks for that help again.