When you say "axles" do you mean the axles that "clip" in to the differential or the drive shafts (commonly called half-shafts)? I believe that the 280Z axles will work if the 4.11 LSD has the groove and circlip in the splines. Some of the R180s uses bolt in axle, with a threaded "button" in the center. If yours has the groove inside, the 280Z axles will probably work, but I'm just guessing, I've never had an R180.
There are some writeups on Hybrids about converting an R180 to the bolt-in style. You might do the reverse.
Read about half way down the page here - http://forums.hybridz.org/index.php/...30-diff-mount/
The whole thread is worth reading.
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