what size tire should i use on the OEM 17s?? i saw a 03 screw 4x4 w/ 315's on the OEMs and it look pretty good. how much rubbing woudl occur and where would i need to trim for them to fit?

 

315/70-17's will rub on the frame at full steering lock. There's not much you can do about that. Personally, I'd go with a 285/70-17 (33x11.50), 305/65-17 (33x12.50) or a 295/70-17 (34x12.00) if you are gonna keep the OEM wheels and not lift the truck.