Re: 3rd gen 16" iroc's
not totally the same, but i had IROC's on the Nova, and the rears went to the rear and the fronts to the front with no clearance issues except for a slight rubbing on the frame at full lock on the back side of the front tires.
oddly enough, when i got rid of them and got a set of GTA wheels with the same offsets, i had absolutely no clearance issues at all.
you don't plan sincerity.
you have to make it up on the spot.
wanna hear about 20 years ago when i was too smart to know any better?