I have one of these Mark IV evaporators out in the garage (this is a photo from the interweb of one in ugly shape). Mine is in better, aesthetically pleasing condition and does work, and I have the brackets for under dash mounting. I took it out of my GS probably 20 years ago. It runs very cold. For $50 plus shipping, which could be as much as $100 to $125 depending on where you live, it is for sale. I'll provide photos of the actual unit in nicely cleaned up condition if any of my Buick brethren are interested in a vintage knee-knocker aftermarket evaporator. I have seen that Vintage Air actually sells reproductions of these from original tooling; they run about $300.
Some photos of the actual unit. Note that one vane on the left vent is missing. I don't recall ever taking off the bezel to see if it has simply fallen out and is perhaps loose inside.
To the top - see the nice photos of the actual unit in post number three. Has there ever been a better time to air condition a car?
