Vauxhall engine?T'is, later ones have a black sensor where the blanking plug is to switch the a/c fans on if it gets hot.
They had the egr with the alloy manifold and gaskets.
Our @RisforRacingnotReverse has pulled one off our old omega diesel to put on his 2000 38', he has all the holes drilled and tapped on his engines cyl head.