I'm adding air to a 66 New Yorker. The path of least resistance is to add a Vintage Air Gen IV or Southern Air Maxi 5XL evaporator unit with a Sanden compressor and modern condenser. I can see the benefit of the modern compressor and condenser. But looking at the smaller sizes of the heater and A/C evaporator cores I'm wondering if I should think about rebuilding an original box and just upgrading the compressor and condenser. Any ideas about this?
