A-body 8 3/4 with big bolt pattern axles?

The saga continues:

Had a knowledgable friend come over and it turns out the housing I picked up is from an E-body, not an A-body as I'd been told by the seller. I'm not overly worried though... my Demon's fat rear quarters can take the extra width... it's only a matter of 2 inches or so per side. The 15x7 rims I have now are at least 3-4" inside the wheelwell now, and that's with a 3/4" adapter (5x4 to 5x4.5) bolted on! I figure just moving the spring perches in to where they need to be is my only concern... and that's easy enough to do.

I like the idea of reusing the 7 1/4" brakes... that'd be a real money saver since mine are perfectly serviceable.