Personally, if your just running Carpet, I'd stick with the std rear end for the car. Addmitadly I have never tried the Pro-Mod indoors (it has something to do with a fear of bending the lovely alloy wishbones
).
Sounds like you race in some illustrious company there, glad you like the setup, I'm still working on little bits of it. Unfortuantly haven't had a lot of time to race over the christmas/new year period, so nothing new to report yet.
Cheers
Ed