The nice thing about the wider B-Body axle is you might be able to use the same wheel on the rear as the front if they are both higher offset. That's how I can run a square 17x8 +30 setup.
I run a 68-70 B-body rear axle in my Duster. You do have to move the spring perches, and anyone that tells you otherwise is a shade tree hack. The good news is, if you're moving the perches, get a DoctorDiff 1/2" spring offset kit and move them to 42" C-C and get some more room for tires.
I run a staggered set up on my Duster, but my 18x9's up front have a +35 offset and my rear wheels are 18x10 with a+38 offset. So it would be easy to run the same wheel/offset front and back on any of the Sport body cars with a B-body rear axle.