Will Boss 338 (18x8/18x9.5) fit on my 69 cuda?

Well I originally wanted to mount just the wheels to see how much room I had for tires. I dont mind having smaller profiles tires but 35 would be about the limit. Im thinking maybe a 235/35/18 or 225/40/18 for the front and 265/40/18 or 275/35/18 in the rear