My 1988 924s has not rear sway bar, should I add one?
 

My 1988 924s has not rear sway bar. I think the front sway bar is 21.5 mm. I was thinking of getting poly Ricochet sway bar bushings for the front. Car will be mostly street driven with begginer hpde. Should I ad rear sway bar for best balance or not. If so, what size would balance out best with front stock bar?