Probably 18" rims since high level performance DOT wide 17" tires are disappearing.
Think 275 wide in the front as a starting point. In the rear, I don't know what people can fit in there with a low stance. I'm sure 275's will fit. I'm thinking 295's with fender lip and offset hangers?? And I you mini tube and relocate springs you can get much wider.
Steering ratio does not make the car go faster or slower. It's the driver's preference and whether he can make the car go faster or slower with certain ratios.
I've got 285-40-18s on 10" w/ 5.5" BS for the back of my Challenger w/ stock spring locations and rolled lips, so 275 would definitely fit. I _think_ 295s would fit but I would 3x check the BS measurements as it will be tight. They would for sure fit with the offset hangers and rolled lips.
