I have seen pictures of at least one guy using this setup on a autocross course. and doing well. as for alternatives, how much do you want to spend? there are multiple vendors for front and rear coilover suspensions as well as Schwartz who makes a complete frame for the rr with all updated suspension. decide what your goal is for use of the car and that will help you separate what is offered as overkill or just right for your purpose. original torsion bar has some advantages in tuneability as the weight is unsprung and down low for center of gravity. ma mopar was a little ahead of the time when created this suspension so it is a tough decision to decide on keeping it or switching it out. . the Hotchkiss though is a good setup.