Question about the hole under primary ports.
 

Vhat is this hole? I bought my car with european but broken engine.
The only engine i could get was from USA. I swapped engines but i used all the parts from the european.
The intakemanifoild of the european Did not cover this hole.
However on the USA there is a channel on the manifoild from this hole whitch goen into the carburettor.

Is this a exhaust EGR hole thing?

Trying to add picture.

The hole is the EGR hole. It connects to the EGR passage on the top of the iron.

Thank you for quick answer