Adjusting holley carb!
 

anyone know how far in the mixer screws on the side need to be! I rebuilt a holley thats going on my 13b and i dont want it to mess up the carb!

If it is the screws in the side of the metering plate then they are the air/fuel adjustment screws for the idle. You will need to adjust these when the car is running. I would turn them all the way in then out a turn and a half to get it started. Then adjust each one turning the screw in untill the engine starts to stumble. Then back the screw out about a 1/4 turn. Proceed with the other side. This is how I adjusted them on my mustang, it worked great. Hope I could help.

Chach