"2manycars" -
I wouldn't bet my life that 1937 was the first year for this floating design on Fords, but that's what I seem to recall from the manual. I hope I didn't misadvise you. I think, however, for the audience on this Model A website, it doesn't really matter one way or another.
If you are interested in reading about this experience, check over on the early V-8 section and do a search for "1937 brakes" or use my name. A couple threads with lots of photos can be found. It was interesting to step out of my Model A and t comfort zone to do the brake job on my friend's 1937 Fordor, but it wasn't enough to pull me into the V-8 camp.
I'll stick with T's and A's, thank you.
Marshall