What's the point of the space between the floor and the mount plate- you could tighten the 1/2'" bolt till the space was gone. ????
you know there is a rubber mount in that space right? check the Mid50 catalog for all parts and pieces and how they go together, good pics there.
The pic of the assembly in the Mid50 catalog isn't really correct for a 54- however, they do show the space in the view of the "front cab mount upper cap & plate" (floor line, note space).
Guys, thanks for responding. I called Mid50 with my question, they say Ford built them with that gap, maybe a 50's better idea. If you have not actually replaced these things you probably don't get what the question is.