I got my 15x7 Rallye wheels a couple of weeks ago, and when the time comes for rubber I want to go with a stock tire size. I don't really want to go with Polyglas because they're a little too pricey when I plan on leaving little black patches around Puerto Rico. What's the modern equivalent to the E or F60 15's? It's going to be a 340, 4 spd 71 Cuda, so I'm not sure if that changes the size at all.