I want to get 17 x 9 inch chrome cobra R's on my 1991 GT. I am doing the 5 lug conversion bc I think it looks better and its stronger. I know my stock ponies are 16 x 7 and sit on 225's. My question is will the cobra R's fit with no modifications and what tire width should I go with for 9 inch wide rims? I would like to go with Nittos or BFG comp T/A's.