Rex The dual air option was offered on many Imperials and Chryslers. The Le Baron owners like to say they either have the N/C air or the option of dual air. There is a Formal Black '63 Le Baron in Omaha, Neb owned by Jeff Ingraham which has the dual air option. I too have a dual air '66 Le Baron. Rodger & Gabby Colo Spgs '47 De Soto Custom w/Fluid Drive & passenger door mounted swamp cooler '63 Le Baron w/F-Sweep trunk lid & std A/C http://www.1962to1965mopar.ornocar.com/rodgergabby63.html '66 Le Baron w/dual A/C & reverbed AM/FM