3/4" front sway bar for all Sprite and Midget, complete with all mounting hardware.
A car has 'neutral' steering if while turning in a tight circle at moderate speed the car will complete the circle at approximately the same position. A car has 'understeer' if turning the same tight circle at moderate speed the diameter of the circle increases because of the front wheels pushing out. A car with 'oversteer' will decrease the diameter due to the rear wheels sliding out. Production cars are designed to 'understeer' since, in the minds of the engineers, this is safer and easier to control; lifting your foot off the gas pedal will stop the understeering.
A basic rule of thumb, ignoring the effects of tires, horsepower, etc.; if the car oversteers (back-end slides) you should increase the size of the FRONT sway bar, if it understeers increase the size of the REAR sway bar. You can look at changing the size (or installing) a sway bar in two ways; if the car 'pushes' at the front you install a (bigger) bar at the rear to force it to have less traction, making the car more neutral, or the technically correct logic says that you are changing the weight transfer characteristics of the front by transferring more load to the rear.
The stock Bugeye was not supplied with any sway bar, later Sprites and Midgets had a small front sway bar. This minimized the tendency of the car to be tail happy (spin-out oversteer).
The higher your expectations, the higher the horsepower, the bigger the tires, the more you will want to adjust the sway bars.