I have an R230 Rear Differential and short axles (long) for sale and also a R180 WELDED for driffting/racing. In addition i also have a padded roll bar for a 240z. I think it is a MSA.
INFO; The R230 is a Must for anyone going for extreme horsepower. It is much stronger than the R200 and the Ford 9". I will upload pictures as soon as i can.