Best Gearing for 8 3/4 Behind 1970 Duster 318

My Swinger had 2.76's and I switched to a 3:23 (with a 255-60/15 tire) The 3.23 is a good gear but I may get out on the highway driving 4 hours to a car show. I can see where a 3:55 or 3:73 gear would be a lot more fun cruising around town. I don't do burnouts or race so it really wouldn't be needed.