Not really too impossible, it's just A LOT of work. I pulled the dash from a 77 Bobcat at the junkyard to keep as a spare. The windshield had to be removed for access to the screws along the firewall at the base of the windshield. Then I dropped the steering column, removed the glove box insert, radio bezel, switches, gauges, vents and ducts, heater control panel, wiring harness clips, fuse panel, dash struts on each side, then removed the rest of the mounting hardware for the dash.
It took about 45 minutes to do, but I really didn't give any concern to the well being of the other parts that I didn't want. I will admit though, I did cut the harness in some places.