Slant 6 intake question

It sounds wrong that the 68's vacuum line runs to the carburetor (vacuum is already available there). It should run thru the firewall to the cabin, if you have the push-button climate control like my 69 Dart did. I see AC tubes (disconnected), so you should have push-buttons on the dash. If not using it, just cap off that vacuum port. If still confused, try posting in the Slant Six forum, or search at www.slantsix.org