I’ve been following your posts on this subject both here and on Hotrodders.com and sunsetdart pretty much hit it on the head.

“.......Mutt................I have a buddy who fabbed duct work out of fiberglass to make defrosters for his 33 coupe. It took lots of hours but what you want to do will be really long hours.

I agree with lamin8r and using something from a smaller vehicle. No need to try to reinvent the wheel.......”

It’s not only just building the box to hold the components and fit under the dash but also the internal doors to change from heat to defrost and AC. Then there will also be choosing dash vents that will complement or at least not look too out of place in the car.

Obviously cost is a factor for you otherwise you’d just order and aftermarket unit and be done with it.


For what it’s worth, if I were building this car and planning on leaving the dash fairly stock, I’d be looking for a vintage 50’s-60s under the dash add on AC unit. Personally I would be all over something like this to restore and (and leave/rebuild the stock heater).

Vintage Original Under Dash AIR CONDITIONER FORD-CHEVROLET-DODGE-Car-Truck-Bus | eBay