Last time I remember pulling the headliner from a non-sunroof car, there wasn't any of the mounts for where the sunroof goes. If you were to try and put a stock sunroof in a non-sunroof car, not only would you have to cut the roof, but weld in the mounts as well

If the car just had the AC removed at one point I bet that you just need a compressor and condensor. Maybe the hard lines from the firewall too. The only cars I've heard of people pulling the evaporator on were race cars that they were already pulling the dash.

Erik P.
Official 2GNT thread Hijacker
Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be...
All we know is, He's not The Stig... But he is The Stig's Spartan cousin!