No Im not saying that...sort of stretched my words didnt you.....?. I have tracked my Z with and without the rear bar..and havent noticed a big difference. If anything, it was easier without. We are discusing your early Z arent we?
What Im saying is you will be able to take advantage of the rear bar more so if you have a fully balanced suspension. Perhaps more in line with what Europe was able to buy. To just throw on a rear bar wont make it handle better. Foe autocross, I agree with Johnc....it does help bring the rear around.