Yea those are the oil cooling grooves for a jdm LSD transmission, Aaron had a set here at one time.
92 GS gold (driver) worklog> http://mx-3.com/phpBB3/viewtopic.php?f=46&t=73405" onclick="window.open(this.href);return false;
93 GS red (wrecked) I modify my ride so I can drive around the stupid people
Well, one of those is a driver's side, and the other a passenger
It's been forever since I had both pulled at the same time, but do the shafts slide in the same depth on both sides? Come to think of it, I believe the DS is a little longer, but I may be out in left field with that one.