Can't read vacuum for 66 Dart

My 67 273 Barracuda had a factory vacuum gauge and it was plumbed into a port on the intake near the distributor. The fitting looked like a pipe plug with a short piece of tubing and the hose just slipped onto that. (Similar to the vac advance hose on the distributor) The guys are correct about ported vac on the carb and the port in #6 intake runner.