I have just finished putting the engine together for my kit (which Stewart Trans will deliver next week). There are two holes under the driver's side of the GT -40 upper intake and one on the front of the EGR spacer and two holes in the back of the lower intake. What are these for? If not needed, can I merely plug them with pipe plugs? Sure looking forward to getting started on # 3877K. Thanks for all the help on this forum!!! Pax'