looks like I may be getting a 70 camaro project from a buddy. I want to run 225/60/15 on the front and 275/50/15 in the rear. I think I`ll be ok with a 15x7 with a 4.5 BS on the front but I`m unsure about the rear. I want a 8"-8.5" wheel but I`m not sure about the BS. I don`t want them sticking out but I don`t want them too far in either. If it matters I`m leaning towards Center Line Convo Pro`s. Thanks.