Here's the scoop from DVAL
RE: Unique Center Vent
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Funny you should ask this. I just wrote up something on how to adapt the center vent to aftermarket A/C for the new owner of my panel.
The procedure uses parts available from Vintage Air.
Directions for adapting Aftermarket Air Conditioning to
Factory A/C Center dash Cold Air Vent
I have prepared this truck to install an aftermarket under dash A/C Heater. The motor already has the necessary crank pulley, and I have included the Chevrolet Factory block-off plates needed to cover the holes in the firewall after the old heater box is removed. The factory block off plates will add a finished look to firewall after installation.
The 64 – 66 Chevrolet trucks offered a Factory Air option that included a center of dash cold air vent and moved the ash tray to an under dash location.
The following is a list of parts needed to connect the center of dash cold air vent to an aftermarket supplied air conditioner;
Vintage Air # 62415-VUE 2” to 2 ½” hose adapter ( 2 needed )
Vintage Air # 49592-VUI 2 ½” Y Connector
Vintage Air # 06250-VUE 2 ½” Duct Hose
Start by attaching the hose adapters ( # 62415-VUE ) to the back of the Chevrolet Truck factory center dash vent using super glue or another maximum bond adhesive of your choice.
Connect two short lengths of the 2 ½” hose ( # 06250-VUE ) to the Y connector ( # 49592-VUE)
Connect the Y Connector using the 2 ½” hose to the center vent output of the aftermarket under-dash air conditioning unit.
Two more dash vents will be needed on either side of the dash. There are a number of ways to go there using either under-dash mounted, or round or square shaped louvers that would be cut into the dash face.
I had planned on adapting the Chevrolet Factory a/c knobs to an aftermarket controller.
There are two vendors that I found,
Vintage Air (
http://www.vintageair.com/) Sure Fit system and
Old Air Products (
http://www.oldairproducts.com/shop/index.php ) that manufacture under dash A/C heat systems for this truck. Of the two, Old Air products claims that their controller can use the factory knobs.
If retaining the factory knobs is something you wish, then Old Air would be a good choice. If that is not a priority, then either vendor would supply a kit that will go right in when installed by a competent installer.
DVal
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1964 C10 Panel 350 HO Crate and 700R4
1937 Ford Cabriolet ZZ4 & Tremic 5 speed