What I was talking about was making a loop of steel to clamp around one pipe near the housing where it hits and run a tube back to some part of the engine or bell housing bolts so it pushes the tube away from where it hits. two gaskets just give some flexibility of position with minimal movement on the head face. If it was worth the effort this would be a way to keep the pipes pristine.

As side draught said, if a small dent was not a problem, the dent would have a very small effects on performance if any.