I thought so too but there totally different, The brackets are different, but there molded to the case. That's why I was going to swap cases.
Also I'm thinking the coolant leak is the Supercharger gasket, seems alot of people have problems with it and knowing the luck I have its the same.
EDIT: Yes RTV is on the corners of the LIM gaskests, but that should have nothing to do with a coolant leak its mostly for oil. Also the LIM gaskets are the Alliumuin ones if that matters.