So I thought I was more prepared for this. Been taking measurements for about an hour now. And realizing that this task is a little more difficult than I originally anticipated. I have the flat bottom against the jig I built. its flat and square to the frame. To get my measurement from the axle to the seat back I will lose my flat spot being parallel to the ground.
I am working off the factory seat settings. Front was pretty easy to get. Need to order some more delrin to make new spacers.
Currently watching seat install videos to see if I get more answers there.