not bad info^, the 5bolt = JDM
but how about the fact if you go with a factory VLSD found in 1991+ 240sx’s (canadian models) to use the whole housing as a straight drop in replacment, you will want either ABS/Non-ABS to correspond to your driveshaft.
a VLSD should run you from $100-$250, and about 1-2 hours install (in a driveway), and the VLSD is more than adequate for any beginner (to RWD/240sx’s)