Tall gears and 4-speeds

Car is a 73 Duster, mild Magnum 360, 833 trans with V8 gears, I think 26" tires. (225/60R15) Currently has 8.25" with 3.55 gears, and...yeah, that's getting old. Does anyone have actual EXPERIENCE with a 4 speed and 2.76 axle gears in a ~3300lb car? How does it drive?