Wheel fitment with e body rear

The E body rear is 2.25" wider than the B-body axle most people use. That's 1.125 more backspace you'd need - not many options that I've found for that kind of backspace.
I'm sitting on an E body rear housing too, but luckily found a local 8.75 housing that was for an early B ('65-'67). Based on my math, I'll still need ~7.25" backspace on a 10" wide wheel ('72 dart). Not sure how much wider a duster can go, but for the same overall width it would be 8.375" backspace on a 10" wheel to use an E housing!