Interesting mystery. There's no "Chevrolet" stamped or painted in the dash of my '54. I have the three window cab. Maybe it's another difference between the 5 window and 3 window cabs. Edit: I see you have a three window cab. Must be a difference between Canadian and US built cabs.
That is a mystery! I have a US built ( Kansas City ) 1954 3604 , three window, and the letters Chevrolet are stamped in the center of the dash. Can you look on the backside with a mirror / flashlight and see if the stamping is actually there and someone at some point filled it in with filler to smooth the dash ? Just a thought.....
Ron