On my 1200 racer I used 240Z front springs (cut roughly in half as I recall) and stock rear springs. I used a stock front bar and had done the items that are outlined in the handling book from Nissan/ Datsun that you can download on this site. The only place that I deviated was the installation of a rear panhard bar that was adjustable. This permitted me to raise and lower the roll center to compensate for immediate conditions. The combination of the adjustable front camber and the panhard bar allowed for about the amount of adjustment that a novice with one friend at the track for crew can accomplish and I found this to allow the 1200 racer to handle quite well. A car had to have a bunch bigger tires and 200+ more horsepower to leave me behind in the truly twisty stuff.