With the grinding sound the Vortech makes, they might replace the noisy alternator for you under warranty
If they're anything like my local Ford Service shop, they won't even notice it's there.
I have my car serviced 200 metres away from them, at a mechanical shop owned by a friend of mine. He has built the bulletproof transmissions in my XY and Cobra. It's funny - when people ask where I got my you-beaut, custom modified, billet everything, big dollar racing trans from, I tell them the local UltraTune shop. They don't take me seriously....