IF you put runners on the front (15 X 4), some brand wheels will fit. I have tried a few 15" combos with the LS brakes and have found the following to work/not work:
This is front AND rear observations, you can get away with a little more if you are running front LS brakes without the rear LS brakes. For most wheels anything wider than 15 X 4 on the fronts I highly doubt will fit.
Centerline REVs (15 X 4) will fit on the fronts. Rears will have to have extensive material on the calipers removed, less material to be removed if you run 1/2" spacers.
Weld draglite/prostar: rears will fit WITH a 1/2" spacer and/ or a little caliper material removed. (Sorry didn't have a chance to check the fronts) I would assume the fronts (15 X 4) would fit as they are made simular to Centerlines front runners.
Micky Thompson pro-5 wheels, rears will fit, fronts will not
These are the wheels I have tried, I'm sure there are others that would meet the specs.
I do know Bogart wheels will work, but you will pay for those, not cheap but are good wheels.
Here is a pic of my 15's on my car (15 X 10 / 15 X 4) with LS brakes on all 4 corners. And a link to how I got them to fit:
http://www.turbobuick.com/forums/brakes-suspensions-tires-wheels/280203-new-drag-wheels.html
HTH
Todd
