Vac advance is the one on the passenger side. Choke diaphragm is the small one on the back. Big on the bottom of course is the PCV.

Good carbs. I love BBD's. I better model would be one with a "tin top." I think '76 and newer. The ones that have a bent PCV fitting are for slants. (I buy those!)

"The only thing to do for triumph of evil is for good men to do nothing"

"NUNQUAM NON PARATUS!"