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I got a bunch of extra parts with my 54 when I bought it several years ago. The previous owner had a 56 parts truck. Through the restoration I used which ever parts were in better condition. I had reconditioned the 56 heater a couple years ago, wrapped it up and put in the attic. I was aware the 54 and the 56 heaters were a bit different but it appeared to me at the time that they were interchangeable except for larger diameter defroster duct tubes in 56. After installing the cowl vent a week ago I found that the operating arm blocked the driver's side defrost duct.
Here is how it was adjusted.
Abe I had the same thought when the problem appeared so I went digging and found the second arm in my stash. It is the same. Maybe someone here with a stock 56 and a recirculating heater can show us a picture.
While thinking about a solution, I considered adapting the 54 plenum to the 56 heater. Would have been about the same amount of fabrication.
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
