Anyone have pictures of a '53-'55 panel truck heater set-up. Did the 53-55 panel truck differ from the regular trucks, did those years ever come with a single port heater plenum. I have a truck dual plenum to swap if I need to but if mine is stock for a panel truck I'll leave it. It doesn't look like it's been modified because it's not even close to the truck dual plenum one.

Mine:










and the regular truck unit:

 

Not sure if mine is original or not.
Yours looks like it is a deluxe model compared to mine.

 

bump for others......