Backing plate offset

Just to clarify, what exactly did you get for axles? You stated "I bought SBP axles from Moser (also factory specs, I guess 27,***" length...)."
What is the center register diameter? Thats very important.
Any other specs listed for them?

These are the ones I got:
http://www.moserengineering.com/axl...4-rear-stock-a-body-drum-brake-spline-30.html

I dont have the messurement on hand, but I'll find out.