Ok i'm replacing my H/E and Also going to go with the fuel cell style I/C res tank. I was wondering what people recomend for the coolant? I have heard some people say go with the Ford Gold coolant and some people say go wtiht he Royal purple. Does any one work better then the other? Also is there anything I should look out for when doing this swap. (somethign I heard about the pump not working in the S/C if air gets in it?