66 Dart GT HT Whatsitgonnabe?

That port by mr 7 is the one everyone uses for power brakes ( or in some cases vacuum to the heater core or vacuum gauge using a fitting with a little fitting of course. That little thing in pic Nr 3 is used on the passenger side axle to maintain axle end play after it's set. I see you mocked up the throttle bracket - it would work great with a 2 barrel. A later bracket might solve the problem. As you can tell, I'm back on my phone now.