You NEED to check the offset and back spacing on your wheels. That will determine if a 28 will fit or not. I'm thinking the centerlines had 2.75-5 in bs on their 8.5's (if I remember but they may have new different sizes). A 5.5 bs on an 8 is barely enough to get 28's off the fenders on our cars. So a 5 on an 8.5 would stick out an inch. Check the wheels.Would 28in fit? Being lowered
If your car starts running well you will be on the limiter in fourth through the traps with a MT82 / 3.73 gear combo and a 28" tire. Assuming you have a 7000 limiter.
Thats why i'm changing over to a 3.31 gear.