rear brake swap question

Tracy, took some measurements off one of my 8 1/4's. The backing plate bolts are as follows (on center's, approximates, I may be off a 1/16 or so)


< 3 1/2">

^ 0 0
1 9/16"

v 0 0

the center surrounding the axle is 3 7/8".

Didn't pull apart one of my 8 3/4s to check. The 'Cuda is off to a new home tomorrow and the Satellite is just a pain in the butt...