It seems to be fitting, the screw holes loosely line up and it seems to be sitting flush on top. I have not actually applied TIM yet or screwed it in. I can't be sure until I attempt to screw it in of course. Any areas in particular you think may be a problem?
aside from it being a socket 775 mounting system in an 1155 is the only one.
but hey, if it screws in, is tight, doesnt move, and fits flush, then hell... your good to go.