Heat block off intake gasket?
Use a very small amount of 3m weather strip adheasive and glue the metal block off plates to the head to hold them in place. Let dry. The yellow plugs are used to hold the gasket in place. Look at the heads and two holes on each head are wide at the opening of the bolt hole to accept the plugs. Lay gasket on heads then put two plugs in each side to hold gasket in place.