I used to flog the snot out of my 300, I had an 85 turbo.It IS more of a true GT car, but I'm currently looking forone as a track vehicle. There are a few things to look outfor though.
1. The rear camber problem is time consuming to fixif you don't have a lot of experience with chassis work.there are 3 rubber mounts to replace to correct it,subframe connector bushings (2) and the rear diff. mount.
2. The injector recall... call up nissan to find out.
3. There are companies for parts (courtesy nissan, the specialty shop (
http://www.thespecshop.com), and a few others)but there aren't that many. I know cusco made a few bitsfor the z31... along with a few other companies. Tokicoand kyb(?) have your struts, suspension techniques makesome bigger swaybars. A lot of my susp. components camefrom group buys at z31.com
4. Haven't been there in a while but z31.com has a lot of infoyou may find useful.
So now that I'm a post ho, I'll go to bed like i'm supposed to now...
raj