Well, we definitely recommend some polyurethane motor mounts if you're going to be making a lot of power. We developed motor mounts for our Stage 2 Supercharger kit because we needed the clearance and wanted to keep the motor from jostling around.
Here are some pics of our motor mounts (they come standard in our Stage 2 Supercharger Kit, but will be available separately):
At 1:25, you can see the mounts in action on our Stage 2 Supercharger Kit.