I wanna drag race----help

If you are going to run sticky tires, get ready to throw alot of money at that 4-speed. Chances are you don't have an 18 spline, and a 23 spline will not hold up in a drag car. They are tough, but not that tough.
If you don't intend to run the car on the street, you can sell your gearset, and fill the case with Liberty gears.