Oh! And the other observation I made when I had my 68 Charger, I ran the tried and true 275/60R15 meats on it with 3.23 Sure Grip. Well, when I went to get the body work done I put the 14x6 70s Rally Wheels back on that cam on the car when I bought it. I was amazed at how ditching the big rubber woke the car right up, as though I had installed 4.10s or something. Anyway, I'll once again be running 3.23 gears in the Road Runner because they are original to the car and won't cost me anything extra. And I reason, running factory steelies will give the baby big-block a little added punch it could use. And who know's? Maybe down the road I'll think about a gear and or wheel/tire change, but for now, I'm thinking factory-fresh-stock is a good starting point.