For the street or are you talking for the track? If you're talking track it depends on what RPMs you make your power. You want to get the gear that will allow you to cross the traps at pretty much the exact RPM you run out of steam in 4th (if you're stick). The gearing is different for every engine/chassis combo so you'll need to supply a lot more info about your set-up to get anyone to give you an idea of what gear to go with.
For minimal track time but mostly for a 20 punch,my car is pretty much stock all i have is a very mild cam and a gt40 intake.I tough the only thing that matters was how tall the tire was.And yeah my car is a stick.Should i wait till i finish my engine mods.