What tire size with 4.56 gears

I am finishing my Plymouth Duster with a 340 4 speed. The 340 is 10.5 to 1 ported Jheads. The car will be driven very little on the street for a couple car shows but I want to get on it at the track and am installing 4.56 gears I have laying around. I just need to know what street slick size to put on the rear. Any help is appreciated. 15 inch rear rim.