see quote below from Dattebayo:
Dattebayo wrote:5 bolt star pattern J30's are 1994 and before.
1995-96 J30's have the same pattern as the 240SX, all that is needed are the J30's two long support bolts from near the drive shaft and the washers that go with them. Some people say you need to swap your regular 240SX drive shaft for a shaft from a ABS equipped model, but mine has been fine for 3 years now no problems...
IIRC, some say it is necessary to install an ABS driveshaft and others say it is not required.
Also, try [
zerosearch?id=2377966&page=1]this[/url] or [
zerothread?id=38210]this[/url] for other info.
Sorry, I have not researched specifics on the '97 J30 VLSD. Everything I have read deals with '91-'96 diffs. It might be best to just call the Infiniti dealership....that is if you have a good parts manager in your area. Hope I could help and good luck
EDIT: this one also