R180 4.11:1 open diffs on Ebay

For all of you racers, I've got a couple of R180 diffs from 85-86 720 4x4's for sale on Ebay. They have the 4.11:1 r&p, use the center bolt retained side flanges and are open. I haven't pulled a cover but I have been told that these have the four pin carrier which would make them a bit stronger(?). They are a direct bolt-in. If interested, search under seller, ezzzzzzz, or contact me here. I only got these for the CV style side flanges to convert my NISMO LSD R180 to eliminate the u-joints.