I bought the a/c years ago from MSA and have not installed it.  I have lost some of the parts over the years.  One of the parts I lost is the box that fits under the blower inside the car.  The drain hole in the box came broken during shipment.  I wonder how to install it without risking moisture on the floor pan causing rust.  The bracket that holds the compressor does not line up; and so, I know I am going to have to modify it to make it fit.  I guess I am going to have to call Superior for more info. 
Superior Manufacturing Corporation 
135 Andreww Drive 
Stockbridge, Georiga 30281 
Phone #: 1-770-474-8300