Have a 71 with a 4bbl carb intake on it.  brake booster vacuum line is not plugged in so no power brakes.  Have 6 open holes on intake but can't find a good vacuum port.  No balance tube on intake but holes are there and open on both sides.  Car runs good but the lack of vacuum is puzzling.  Other than switching to a factory SU setup where can I pull vacuum from?

Step into the light and install the SUs. They are easy to clean up, and you'll be able to close your hood.