Nissan used the R160, R180, R200 and R230 in the Z lineup (not sure what the 350Z uses). Subaru also uses the R160, R180 and R200. Not sure what Toyota used but I wouldn't be surprised if it was the same series of diffs. Just food for thought.
"The 300ZX Turbo is a dance; it's a song; it's rolling, roaring automotive art. There is no color that doesn't suit it. There is no mood-lifting chemical substance it can't replace." - Automobile Magazine