what size axle would it have to be
Should have a date in the front label unless it is a very inexpensive wine not worth drinking.
my suggestion is to contact a wine dealer that specializes in high end and rare wines the best p;ace i know of in the mid west is the village corner on south university and forest in Ann Arbor Michigan the owner is a prominent member of the tasters guild of America and also has the largest collection of wine in a three state area.
You mean drive shaft? If so, definitely (site below) if you literally mean a solid rear axle? I don't know why you would want that and no, I have never seen it done. I love the independent suspension on my s13 240. For more informative answers and help check out the second site i listed (NICO)
Anything is possible, but why downgrade to that? From the many 240sx owners I know, I have never met anybody that even considered dropping in a solid axle. Independent suspension is quite awesome.
