I'll match your tires and raise you one! Sorry for the crap pic. This is why I went mini tub. Narrowed 8 3/4 requires seriously shallow back space (deep dish) rims. I want to go 18s but right now the budget isn't supporting the massive cost of custom rims and big azz tires. If I hadn't started with my current axle I would have used a B body like you did. But I'm not redoing all that I've gotten done.
I keep looking at my current bumpers and it's giving me fits the way they stick out. I could easily change the rear to the earlier model I have on the shelf but I would have to narrow the front to match. Not difficult to do but the chrome is in really good shape on it so then I'd have to get them both rechromed. Mo money , mo money, mo money. Ought to be my theme song. Painted bumpers would look out of place with my planned paint scheme.
Those 18s sure do look good.....