I do know ours are 17 spline. Kodiak, what brand are yours, they look indentical to the ones you had on. The red face style.
I will try tomorrow.
As far as the foam under the bracket, I was actually planning on using the non-skid type tool drawer liner, it should prevent the bracket from rubbing against the door, thus preventing rust. It also will give a bit of room for water to evaporate.
I believe that it the rear door will look fine with the tire. It is already shaped like the tire, even the rear window is curved to match. Mine will also cover my dent![]()