Oh wow. So that's a major offset in the opposite direction from most.
Honestly, I'd put a different rear end in it. B body housings can be had for under $200, and new axles will only set you back about $300 from Dr. Diff. Swap your current pumpkin and brakes. Yeah, you'll have to re-weld the tabs for your 4 link, but compared to the price of custom rims you'd be ahead.
I can do that. I'm guessing you want to see how far the tires stick out compared to the lower parts of the quarter?