55.2-59 Three point seatbelts

[8man]

Since I'm waiting on some bolts to come in to finish the frame, I started looking closely at the cab. I am making notes for all the holes I have to weld up.

I found a couple of small rust holes on the rear corners, just above where the two metal factory mud flaps were installed. The mud flaps are still in very good shape, no rust.

While making notes, I started trying to set up the 3-point seatbelt for installation. I was looking for a couple of things.

1. Does anyone have the measurements from the inside of the door frame to the first bracket on the floor?
2. A measurement for the second bracket?
3. Pictures of your installed so I can see where you put them.
4. Has anyone done a 3-point? I've seen 2 YouTubes on that subject, and I'm just not sure about the way it was done.

If you can help, thanks.