Hey
I found these forums in a google search for, you guessed it, nissan forum! I'm restoring a 1974 Datsun 260Z with my father, and we plan on a lot of modifications, including a throttle body conversion and a blower, and blueprinting the engine, but nothing that can't be un-done (except the blueprinting, which will reduce wear and extend engine life). Also, until we do the throttle body conversion, we have the early roundtop carbs in place of the "economy" flat-tops.
Here are some "before" pictures. We'll be starting on it soon.
http://z.waveracer.net/img/z/Z-2.JPG
http://z.waveracer.net/img/z/Z-3.JPG