How do you cool you motor in between passes?

Meziere makes a couple of divorced style water pumps. You'd just have to come up with a plate for some AN fittings on your newish Hemi. On my small block I have an extension cord wired into my pump and fan. I can cut the battery switch off on the car and hook my cord up to a deep cycle battery I always carry along. Let it run as long as I want without draining the cars battery.