I have a '13 V6 A6 2LS & I'm swapping in a complete rear end from a low mileage '13 1LE. What if anything should I do while I've got the cradle out? (Don't worry I'm doing the front as well for a full FE2~FE6 upgrade) It's a 2nd car not a DD so I don't mind a stiff suspension but I don't want the ride too harsh so no solid bushings. I'm doing this upgrade to correct the body roll I experienced at the track(see pic below from Laguna Seca) and improve my AutoX performance.
I've already done the Brembo upgrade and they seem more than adequate.