What does the VS stand for in the original post?
Friedgreentomaters has the test.
I have a couple of posi pumpkins that fit in my standard half ton H033 rear end. I installed one at the same time as I did my Napco upfit. They are a clutch pack type, so limited slip is a better term. I can't find any information about their original applications, though, as they are obviously not the Spicer that became a posi option for these trucks in '59. That's a whole different rear end.
