66 Dart GT HT Whatsitgonnabe?

As long as that port has full vacuum all the time, then you'll be OK. Hopefully you can route the hose so there's no interference with other components. I'll see if I can get some pictures of the 2 barrel and 4 barrel throttle bracket and the bracket for the return spring this evening.

There is another port by the number 7 intake. See pic. It's very oxidized, not sure why. It's not a water port, is it?

The bracket doesn't fit, just like you said.

Could the little thing on the third picture be the bracket you're talking about?

And I finally figured out how to connect the throttle. The wire! I thought it was the choke wire. :)