in December of 2009 I managed to find a vintage air setup for my 1940 ford.
unfortunately the under dash area of a 40 wagon is somewhat limiting.. especially when your buying someone elses used parts!
to compensate I am thinking about installing a second evaporator for rear seat passengers..
I have two concerns..
1. what does the A/C line routing look like (ie do I put the second evaporator in series with the first, or parallel?)
2. how do I determine what size compressor I need?