Please help

[speedracer]

I have asked these questions to a bunch of people and either no one knows the answer or no one gives the same answer.

1. I own a 2004 cobra, will 10.5 rims fit on the rears without having to do any modifications? If the answer is yes, can I put "true" 315's on without having to do any modifications? What I mean by "true" is that I know that Nitto 315's are smaller then any of the other manufacters 315's. So would I be able to fit a pair of BFG 315's on the rears without modifying the wheelwells, supspension, ect.

I have FR500's on my car (10.5's in back) with Nitto 315's and when you first put th rims on it looks like they will rub the IRS bolt but as you lower the car back down the IRS bolt goes down with the body into a place where ther is more clearance, I plan on putting Hoosier 315's on this spring and I'm not worried about them rubbing. Lethal Performance sells a IRS bolt that's for more clearance too. There is plenty of room in the wheel wells too.