Here is the missing piece of your white overlays package!
This overlay is identical to the stock layout of the HVAC controls on a 1986 Camaro with A/C. Download the overlay and print it out on your choice of paper, cut out the gray areas and glue it on top of the stock HVAC panel.

We suggest for the best result that you take the file to a print shop and have them print it out on a semi-gloss "sticker" type paper, so that you can simply stick it on top of the stock HVAC panel.

 

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