Rear tire size
 

I just sold my P236 R60 14 inch cregor rims and tires. My 66 coupe has a 347 stroker with a 355 posi. With my old tires it would not hook up, I want to keep it a street car. Going to 15 inch rims. What tire size do you recommend for better hookup? I thought of drag radials but I don't want to break my 8 inch rear end.