2 different 10x1 3/4, 8 3/4 backing plates?

And as for the Phord vs Mopar backing plates I have a pair of Phord that I was going to measure and compare to the Mopar. Mount Holes can be redrilled to mount it to the Mopar housing and the “green bearings” are definitely not Mopar.
I’m also going to compare to a Jeep backing plate…
All an up coming tech article I will post.