This is the original 1973 date coded thermostat housing from my car. I'm rebuilding the engine and would like to use as many date coded original parts as possible. After bead blasting it, you can see how deeply pitted this aluminum casting is. Is there a way to fill in these pits and make it smooth enough to accept the upper radiator hose without leaking? I already have a new one, but there is no date coding on it. What do you think?
