i have a s13 open diff with a j30 center section and 5 bolt output shafts
this diff is a hybrid or the same thing as a s14 oem vlsd the final gear is 4.08 because i used the s13 open diff center section pinion ring intead of the 3.96 gearing found on the j30 center section. it also has a j30 rear cover wich bolts in s14 make offer .