Whoa partner! Before you go searching all over for and AC system for your AD truck, take a look in Fort Worth, an outfit called 'Old Air'
They make kits for all kinds of old cars and trucks and my experience with their tech support was really good.
My 54 3100 does have a 235, converted to 12volt with GM single wire alternator.
The ac plenum they sell is a very nice fit under the dash, and the kit conforms well to the rest of my truck.
I live on the Texas coast, humidity in the 90's and summer high temps near 100 are the norm. the unit is 134a, came with brackets, hoses, a special AD truck firewall grommet, the works.
My temp guage does rise a bit when I'm driving around town in the afternoon, but when cruising, it runs just fine. I installed a special fan blade to improve cooling, probably will go to an electric fan in the future to help out.
One of the simplest set-ups I found and these guys understand Texas heat. I last dealt with Old Air about 5 years ago.
I suggest AC, insulation, my wife is especialy fond of Thunder's AC.
Jim
