17x8 255/45/17 4.5"bs
28x9 295/45/18 5.9"bs, 7/16" spacers, 3" studs
Stock suspension. In my opinion its VERY difficult to get the 'right look' with anything bigger than 18s on stock suspension. You just lose too much tire height. If you went with a larger wheel/short tire you would have to drop your suspension 2" atleast to get it to not look like a wagon, even that is probably cutting it close. Tire height is the biggest concern when going with a larger wheel, muscle cars just need some sidewall at stock height. The rear tires on mine are 28.5" tall, still 1/2" taller than the common 275/60/15 most of these cars run.
These are 19/20s with full air ride suspension with no air pressure (on the bump stops up front)