Gear Ratio Recommendation

...and that's why I saved up to have a 200-4R OD trans built for my '69 Dart.
It fits in an A-Body without surgery to the tunnel and will let me run 4.30 gears for around town fun and games. The 2.74/1.57/1.00/0.67 gear spread is good and will be like 2.88 rear gears on the freeway.