I have a vacuum port in the carb adapter on top of the blower. I hook a vacuum guage to this for tuning. I have the intake (below the blower) tapped (2 of them). This is where the boost/vacuum guage is hooked. Also have the carbs referenced here, hooked to MSD 6BTM, and water/meth control - all in the intake.
I am not sure what you are refering to for "baseplate", "blower housing port" and "baseplate runner" so we are talking about the same thing.