[clay68c10]

If you want to add factory AC to one of these, get the assembly manual. There’s a fair amount of work involved. Most of it is just tedious fitting and adding fastener holes. The difficult part that visually matters is getting the dash vents located.
I started the ball housings by modifying a set of housings that had broken clips. I removed the rear part that sticks thru the dash so I had a template.