OK. I am trying to decide between a stock fully rebuilt 9 bolt or a fully beefed up 10 bolt. I have both already. I just don't know which one to go with. It should cost about the same ether way. The iroc will have enough power to break both. But I need a rear to use before the blower goes on. I'll do a 12 bolt or 9" then. Thanks for all the help in advance! Adam :-)

 

Sounds like you already have your answer!
Why wait till the blower goes on? If you need a rearend why would you waste time money and effort to install a unit you KNOW you're gonna kill?
Just bite the bullit and call Moser.

 

Well I could. But it doesnt answer my question. And what if I want to put this in my RS afterwards. Adam :-)

 

well depends are you going to fix it or chuck ti when you break it? either way youll have issues to your choice on which you wanna bust up if not both.