I went through the install instructions and contacted Vintage Air today on the wiper area. The kit comes with the metal piece for the wiper area and they noted no metal fab is needed for the install so I think that issue has been resolved.
The glove box is something that gets modified but I dont feel that strongly about the glove box size. Its a stuff catcher and the more volume the more stuff that gets crammed in there. I can't think of anything I really need the glove box for.
The visual on the drain on the interior is my biggest hang up still.
I do like that this system eliminates the need for vacuum control and is an update 134 system. Additionally the condenser holds the drier and that tucks in near the radiator so it cleans up the firewall quite a bit.
Seems like no one here has done one yet so I may be the guinea pig on it.
See link for instructions on Vintage Air showing the wiper area and the drain
https://photos.app.goo.gl/sCTVm8zTeLk1mAA67