Sometimes going narrower on the wheel width can be beneficial. For one it gives you a little more leeway on the offset, and track width with a deeper dish. 8 to 8 1/2 inch wide wheel with a 255 wide tire front and rear is the direction I'm gonna go. Most 255 series tires have plenty load range of weight capacity which is important. The 94-96 4200 pound Impala SS's on the same 116 inch wheelbase running a 255/50-17 Z speed on a 8 1/2 in wheel, 100 load index, 27 inch diameter tire, were an awesome handling cars hands down. Still one of the best full-sized RWD cars ever built!