I actually bought a bar from a 107 in order to add it to the front but could not find a place to mount it.

What you want is a neutral car. Having the rear or front break loose drastically before the other will not be fun.

If your front is riding a lot higher than the rear something is wrong on one end or the other.

If you really want to autocross a 123 you might consider looking at the one I have for sale. It's really quick and cheap compared to what you will spend to set up your car. I used to beat mustangs in ESP with it regularly.

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.