Having A, B, & C 3-pedal cars I can say based on the pedal width & shape of the arms that I can see, I'm 98% sure the wagon has C-body pedals. If you compare them out of the cars, A/B/C setups are drastically different & I'd say there would no way you could interchange them. The pedal pads are interchangeable however, the brake pedal pad is a later model A or B with the clutch pad missing. I'd say the likely odds are that they robbed a junk 300L.
Did your 300L not have the badge on it, Tom? On the storage bin door? I didn't see a badge on that wagon's console lid, although the lids are easy to swap out.
Different trims on the top plate of course (wood grain and other finishes depending on the model), as automatics got a centrally aligned top plate with a shift quadrant while manuals got a left of centre cut out with chromed edges as shown below.