Staggered tire size options?

Hey guys,

I’m preparing my new wheel and tire package for my 1971 Plymouth scamp. I’ll be running 15x7 cop car wheels on all four corners, 255/60R15 on the rears. I’m unsure of what size tire to run on the front, car has discs brakes on the front and rear. I’m looking for a nice street car look, widish tires in the rear and narrow ones in the front (narrow while also maintaining safety). Car will be for cruising and driving around as much as I can, I won’t be doing autocross or canyon carving or the like.

Any recommendations and pics would be greatly appreciated!

Thanks