[Zeke3]

The bumpers on my 1937 car are 3 1/2" tall and the is a gap about 1/4" in the center to the floor.

Here are the descriptions of the 1937 and 1938 bumpers from Bob Drake's catalog,

"1937: When installed the end curve goes down like a frown. The bolt holes are just below center line. The rear bumper is different in that it has a larger bow compared to the front.

1938-1939 Standard: When this one is installed the end curve goes up like a smile. The bolt holes are noticeably above center line. Front and rear are the same."

Let me know if you need any more dimensions.