After lots of research and some luck at the Big 3 swap meet, I found my new steering box. I could have used my original since it only has 50K miles on it, but it was 19:1 and I have a 65 mustang box that is 16:1 ratio and in good condition, but I would have had to spline the shaft and really did not want to disassemble the box. So I found a rebuilt 67 mustang box 16:1 ratio and it has a 3/4-36 spline. This is the same as my steering quickener and will make this install a lot easier. I will put a u-joint right on the input to the box.
The box is exactly the same case as my 65 falcon box. Since I had header to box contact I decided to take the opportunity to modify the box for extra clearance. I rounded the area where it hit the headers.
I then painted it with my favorite, hammer tone gold! All of my suspension is painted this color so why not.
Its hard to get a picture of the box installed.
I will be changing out the fasteners to something more visually appealing.