rcca swapped to a saturn 20 they said for more speed, but gave no number
Heck, drop a 19 turn machine wound and a 24 tooth pinion in it if you want cheap speed.
They said as long as you leave the rear suspension alone and don't remove the crossmember the handling remains predictable at speed. It can still roll, but not like if you take the crossmember out. Then it's got good flex, but at a handling loss.
Someday the brushless god will leave a setup under my pillow and I'll put that in my 4wd WK :rof