Nubs on Cop Wheels

I have cop wheels on the rear of the car new with 255/60R15's on them with a stock 8-1/4 rear and I have 3/4" clearance from the bulge of the tire to the leaf springs
The previous owner ran them on the back with the original 14" rallyes on the front with 245/60/R14's on them.

My plan is to run cop wheels up front too, with 245/60R15's. I think the car will still sit nice with that combo.