Edit by Peggy M 7/26: joe had two different questions in the same post. We have to pull out the Driveline question about power steering. The quote here is the one about air conditioning and it goes in Interiors.
How about same question for adding A/C. Want to add a/c to same panel truck -- a 1948 Chevy with a 1951 firewall welded in.
All I want to know is what kit might be the right/best option to buy and use…joe
What year AD truck? It makes a difference for the AC systems.
Edit: looks like it doesn't actually matter for the Old Air Products system.
I have done Vintage Air and Old Air Products before and I was much happier with both the quality of the parts and the customer service from OAP.
Old Air Products Custom System 
