Originally Posted by mranlet
Factory Nissan R200 is good up to around 750whp and is the upgrade to the R180. The only problem would be fitting the proper final drive ratio, but I believe that an Infiniti J30 final drive is something like 3.90...
The custom axles I got made from Moser still use the Subaru hub ends but the shafts are cromolly. The shafts are what were breaking on my RWD conversion, but I haven't broken anything since the conversion (which I hope I can still say a long time from now).
If you're interested I could find out more info on gear ratios, subframe designs, getting my axles duplicated, etc.
j30 is a 3.90 ratio. I had one in my 240sx and just sold it a month ago for $150 wiht axles. the r200 is a great Diff. i now have the 4.08 ratio that came optional in the 240's. Oh and i can gte more J30 Diff's