Denny:

Here are the measurements off my truck. I will try to explain and make myself clear.

Rod Diameter = 1 15/16"

Height of triangular plate
a. The plate itself is 5 5/16"
b. From running board step and fender joint to top of triagnle is 30 3/16"
c. From top the bed rail to top of triangle is 2 1/2"

Base of the triangle is 8" and the two vertical sides (base to the top) are both 6 13/16".

The two vertical sides of the triangle have flanges bend back towards the bed rail. The thickness from the flat front of the triangle to this flange towards the bed rail is 5/8". The thickness of the plate without this bend is 0.10" (or one and a half sixteenths). The base of the triangle does not have a flange.

I hope that this is helpful and what you are looking for. If you need more measurements or need clarification on something just let me know.

Kent S Butler
'56 Chevy 3100
Houston, TX