Work in progress, looking for information. on intake manifold. It has a recessed 1 1/8" dia. hole water passage through the timing case cover. In the new gasket kit there is a 1 1/16" O.D. X 1/2" center hole. This is very sloppy fit. The last person who replaced this seal which was off center , he used a knife to trim the I.D. Parts houses have no answer for this. What is the correct leak free installation? If it is a larger seal where can I get one? Thanks Ken