Unless you love hard work don’t remove the entire dash, it is spot-welded everywhere and is a beast to remove. The windshield area is the worst, once you prep it to receive the replacement it is very thin in that area. When I used to remove them from parts trucks I used a “junkyard cut” trusting the guy that got it would trim it and figure it all out.
https://www.flickr.com/photos/advance-design_parts_co/33267066618/in/album-72157631868452754/