I just checked out a local car that has weld rts 15x11.25 5.5" backspacing on an s13 5lug spindle with z32 brakes.
Apparently they have a brake caliper clearance option.
http://weldracing.com/street-perform...15-in-s71.html
These would be great for anyone looking for an affordable wide wheel.
I'll take some pics tomorrow.