What center duct are you referring to? The cowl vent? If so, it shouldn't matter, I believe the defrost duct to the driver's side routed below the cowl vent. You just want it so it doesn't get pinched by the linkage for the cowl vent operator.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
