shaved
there was a post on here or on sohchonda.com that showed the amount of timing retard that you got from shaving/milling. i think it was one degree for every 0.012 milled, which with every tooth being 8 degrees you'll need a cam gear to get timing back to tdc. and you can just tighten the tensioner if you need to compensate for the small amount slack in the timing belt.
if you read this before the edit, i forgot that when dropping an a6 cam in a b2/b7 that the cam is off 1/2 a tooth or 4 deg, not 2 deg like mine, but then mine was milled 0.024.