I don't have a very informed technical opinion, but based on those diagrams I would say the Ring+Pinion gear sets are likely compatible, since they share a part number. Also, I think we've already had reports elsewhere on the forums of people upping their rear ratios to 4.xx for the dragstrip, so they must've used 350Z-designed parts.
However, most of those diagrams is greek to me. I rebuilt a differential once with a couple friends (A giant Dana one on an International Harvester Scout), and it was a complete PITA.
Lots of re-trying over and over to get certain parts pressed in with a lot of force while shimmed to an offset that was precise to hundredths of an inch, and then re-measuring and seeing that the shimming needed more adjusting, pull it back out, blah blah. Then you have all the funny noises during breakin, and wondering whether you really got it right or if the teeth are .002" too deep or shallow causing problems later, etc.
So if I ever do switch diffs and/or gears, this is one job where I'm just gonna hand the parts to a reputable mechanic that works on this stuff every day and let them go to town. There's a shop here in Houston I used before to do diff and clutch stuff on my Trans Am. They're a mechanic shop that specializes in working exclusively on differentials/gearboxes/manual transmissions of any kind and clutches, for just about any vehicle (mostly big trucks), they did a good job last time around
