Thats correct, Pete
It's a 10 bolt ring gear, I think I read some where, that it's still a stonger unit and is not the same as the olds 10 bolt rear.
I think I also heard the axles interchange with chevys...but I'm not certain if thats true.
The the clutch set up on the posi unit definantly doesn't look like any chevy I've ever seen...(see attachment)
Tom