Idle drop by 500 rpm?

Do you have a vacuum gauge? Forgive me if I've asked and you answered. My memory is short.
Yessir. At the low front ( manifold vacuum) she's pulling 12. Just took that reading... turn the screws into 1.5 fired it up,n little bastard spit at me... I got the carb loosened up now I want to lift it up and I guess close the 2nd throttle blades unless you have something else in mind...