Need new tire(s)

Great thread. I too am in need of tires and am wondering about the idea of slightly wider, and also possibly the idea of different sized on the back, like some of you have posted. I have the 66 slanted dart sedan, SBP, 14in. Currently have 205/75r14, Hankook Optimo H724. I just have steel wheels with dog dish. What size combination could I do? And what do I gain by a wider rear wheel, and a narrower front wheel? Besides the awesome look.