1968 Barracuda Rallye Wheels ?
I had 15 x 6 ,w/3.75 bs and 15 x 7`s,w/4.0 bs on my car with 205/70 and 255/60`s and no issues with any rubbing of the tires. You should be able to fit those size tires without much ado. I got the wheels from Summit. By the way, love your car Chris!