In my opinion the 275-60-15 is the perfect "Day 2" muscle car mod. Its height of near 28" and its 11" section width compliment a muscle car- especially the larger bodies like Mopar B body. The 70 series gets too narrow (again- my opinion.) Id run the 275s and try some lowering blocks. You can get a taller tire with the same width as the 275-60-15 but NOT in raised white letters. The Hoosier and MT pro street radials have a nice assortment of sizes but 1- Are insanely $$. 2- None available. 3- Blackwall only.