I have for sale an long nose R200 mechanical LSD from a JDM HR31
Very tight centre. Has been inspected and set by a diff shop. Ratio is 3.7. Currently in a housing with ABS sensor on it
$1500
Also have a long nose R200 viscous LSD. Ratio is 4.375
$900
I have 3 pairs of half shafts from HR31 to suit the above diffs $300 per pair
Suitable applications 240z, 260z, 280zx, hr31, z31 etc