I have a '48 4400 Loadmaster 1.5ton, manufactured July 1948. It has the 235ci with the SM420 four speed. There was nothing left of a floor mat when I got it, in 2009. However the dampening material is cut out around the floor mat pins in my kick panel. There are also 2 pins in front of the bench seat, one on each side.
In front of drivers seat floor mat pin Drivers side kick panel 2 floor mat pins Passanger kick panel 2 floor mat pins