Hey chap, potentially interested in this and have a couple of questions if I may.
What are the CV shafts from, a Z31?
Who did the rebuild (any evidence) and how can you tell its a Nissan Comp item? (Sorry for basic questions)
The shafts are from a 280ZX turbo I believe. Hopefully these helps and are allowed to be posted... link to the thread at the bottom of this post...
I have no idea who built the diff, I bought it like this from a car that was being stripped for a complete rebuild, he purchased the car from the previous owner who supposedly bought the diff and had it installed not long before he sold the car so it has very few miles on it.
This shows the differences between the R200 diffs: