Did the 47-55 panel body trucks originally have the bows and cardboard panels rearward of the cardboard panel that was over the "cab" (over the front driver/passenger)?
Might they have been added by an owner over the years?
All Suburbans had cardboard "ceiling" panels from front to rear - as shown in a Suburban post above
Do all the 47-55 panel owners reading this thread have holes in the "cross bars" rearward of the "cab"?
My 1948 Panel did not have "cross bars", but it might have had some sort of material attached to the ceiling between the "ribs" (they might have been removed before I bought it in 1969).
From the Factory Assembly Manual:
16.742 Suburban: Panel - Top Lining (Fiber Board)multiple pieces for the Suburban (not listee for Panel: SGL. UNIT)