[C10 - C90 Bill]

Right, the B is definitely higher and that could be the reason why they would fit better. I've might have peeked inside one or two through the years, but never drove one or sat in one. I do remember a large dog house and seem to remember the shifter being further back similar to where a shifter is located on a 9500 (short hood) with a 6-71.

The best one I can remember was in a junk yard. It was a B 7500. Had a 6-71 and and I believe a 10-Speed Road Ranger. Pretty much like your picture above. It was impressive.