Brian, pull the two pins, you will not find the most if not all aluminum intakes will not have the holes. Take vise grips twist and pull out, and suggested earlier use RV instead of the the china wall gaskets.
That explains why the engine and engine bay was a greasy mess apparently there is no hole in the 340 cast iron intake so it would bottom out on the pins and not make a proper seal both front and rear as I say the level of butchery continues
