I believe 'coilover' makes a very good point. My limited experience has been that without insulating the interior with a GOOD type of insulation, the A/C unit will work itself to death and still not keep you cool. Not only does the floor and firewall/toe board need this treatment but also the roof, doors, corner panels, and so on.
What I would like to see is a thread on a good way to beat the large expense of buying insulation that really works. I have seen such things as house insulation used for the doors. This doesn't work because as the car gets driven the vibration shakes the fiberglass and it ends up in a pile in the bottom of the door. Forget jute unless your into replacing floor pans.
