A previous post got me thinking, by having a rear water passage on the intake, how much does this help in cooling the motor? On my wifes 66 Mustang with a .040 over 289 with Ford/Holley tri-power and Vintage Air Conditioning, I am alittle concerned that it will have a tendency to run on the hot side. The intake does not have a rear crossover. I haven't started the motor yet, but will be in a couple of weeks. I have toyed with the idea of adding a -10 AN crossover hose between the ports at the rear, but something tells me not to. Would there be any advantage?