Carb Mixture screw

[bobcostas]

Hey dudes.
I've been working a lot on my truck aesthetically. Now I need to get it running tip top. Now that its warm out, it starts up pretty easy, but it still needs a little warm up to get going. I've noticed two things with my 350:

a) my automatic choke is totally boned. it's always pulling down so the choke flapper is vertical. So in other words, no choke.

b) it seems to be running rich. i smell a hint of gas out of the exhaust.

I have a manual choke kit in the mail to fix the auto-choke problem. i like manual anyway, so its a quasi win/win

now i think i have the stock 2 barrel carb on there. do you guys know which screw is the mixture and how much i should mess with it?

thanks a lot. you guys have been a lot of help over the past few months.