I noticed a couple of you have installed A/C in '40 chevs. I dis as well and one thing I did that I have not seen, is to use the radio grill (got rid of the original buzz box) as 1/2 of my vents. I was trying to look as original as possible so dumped half the air out the bottom of the A/C unit and routed two ducts to right behind the grill....works great, just a suggestion.
