I'm still trying to choose between Corvette c6 rims, chrome Irocs, Torq Thursts or Cragars but I was wondering on a stock 1991 RS what is the widest rim/tire combo that will fit + what size/kind of spacers I should use? also will this change have any effect on the how the car handles? will I have to re calibrate the speedo? and lastly what type of tire would you recommend for a daily driver?

If you know the answer to any of these it would help me out a lot