zylvia213

Yes that would be the correct kit. Now Motorsportsauto does sell a complete polyurathane kit for the S30 which includes the entire front and rear bushings including the mustache bar bushings... i would probably go with the whole kit and its not that expensive.

Now as for the Z31 lsd.... well its kinda of ah direct bolt on.... you will need the following:

1. Z31 diff which i believe come out of the 86-87 turbo 300zx.

2. The diff cover has fins that will not clear the stock mustache bar so you have 3 options.

a. keep the finned cover and purchase aluminum custom mustache brace from ArizonaZcar. com
b. Just swap covers and use a regular open diff cover from an R200 which will completely clear the mustache bar
c. Shave some of the fins off w/ a grinder to make them clear.

Using the finned cover is an advantage because keeps oil cooler and i believe holds more capacity of oil. The aluminum custom brace is kinda of pricey but it looks beautiful and allows you to use finned cover.

3. Stub axels need to be swaped. You need to use the stub axels from your stock R200 diff or else the ones on the Z31 diff wont mate to your half shafts.

4. The pinion flange on the Z31 diff needs to be swapped with the stock one on your diff or else your drive shaft wont mate up to bolt on.

Other than that i think its pretty much it. Its a very simple swap its just finding this diff at the junk yards cause if you buy online from some one shit they go anywhere from $400-$600 used.

Let me know bro if you need more info or advised... im not a professional but i spend endless hours on Z's in the past.