Classic auto air install 1970 Duster with 340 and Edebrock Super Victor EFI Manifold
Good stuff. You're running into all the same issues the rest of us had. Nothing earth shattering difficult but they definitely need to remove the "perfect fit" from the name once you realize all the modifications that need to be made in order to make it all work.
I wouldn't even waste your time asking them to send you a glove box. I know on my 68 it's not even remotely close to fitting. Doesn't even reach the lower mounting holes in the dash at all. You'd be better off shortening a stock glove box than attempting to mess around with theirs.
Keep us updated on how you run the driver side vent tube. I've yet to hear a rock solid method of running this tube through the dash.