Mounting Underdash (Shoddy) Pad on 69 Dart

I know this is an old thread, but I just did this step. You have to have the dash and heater box out for the firewall pad. And the shoddy pad is cut to fit around the cowl opening, and wiper motor mount points. You can figure it out by looking at it. I sanded the undercowl area, cleaned and primered and hit it with some flat black paint to cover the metal from flash rusting. The sanding to me is important because the old adhesive is still on the metal. Then I sprayed the adhesive to the metal undercowl, and to the shoddy pad. Waited a minute or two, and stuck it up to the undercowl. I wouldn't use weatherstrip adhesive because gravity is playing against you, it seems like it would be messy compared to spray adhesive. I have my pedals installed in the car, and it was straightforward working the shoddy pad around them. The drivers cowl/ventbox will have to come out to mount the drivers side firewall pad.