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

I have 275/35/18s. On the wheels they are basically perfectly flush with the lip of the wheel. With the 6.5 bs I can get a finger between the tire and top of fender lip. I have Hotchkis 67-72 front bar and it clears by a mile. Frame rail wise I have about 3/8" in worst spot.