rearend gear?

Its the engine also, short stroke engines like the 318 / 340 love rpms'. If you forget about mpg and have a nice quiet exhaust-which few do, lol--3.90's can make a good street gear. This is why I can't decide, get some 29 inch tires or just switch to 3.23 gears. Now I'm leaning again to the taller tires. I do know I need some quiet mufflers