It depends more on your offset than your sidewall as far as the tire rubbing. There is a sticky at the top of the forum that has a picture of different offsets and where the edge of the wheel will end up relative to the edge of the fender. Very useful.
As for the tire, if you have a 9" wide rim, I would stick with Xsta Z 28's advice and not go narrower than 265's. I believe the stock SS wheels used 275's on a 9" wide rim. Hell, I have 245's on my stock 8" wide wheels so they would definitely not fit right on your 9" wide rim properly.