B body rear axle in an A body

OK, I was off, 5 15/16" rear. Fronts are 5 3/8" backset. Sorry, I don't measure like you do, that's bead to the hub. My perches are 42, 1/2" offset shackels.
Did not mean to bog down this thread with this.

It's not bogging down anything lol-I agree with you!

Your experience is valuable to this thread because someone else may want to replicate your setup and measurements are relevant to the swap. 72bluNblu has provided his info on numerous other threads, but yours may be the path others would choose instead of 18" Enkeis like his Duster. As a matter of fact, this was the route I was planning as I have an 8 3/4 from a 66 B body with 1/2" offset shackles I bought from a seller on here, and will be running Cordoba rotors up front, so what you already have is what I've wanted to do-for that, I greatly appreciate that you've posted your setup and experience. I just can't get on mine yet because i have other projects in front of my Scamp.