I don't think the Jac nor the Guardians will be any gifferent from any other pump & log setup (I finally wore my Niccson's out), so here'a a good link. :idea:
http://www.liquidaddiction.net/cooling.htm
It's really simple, lake water to exhausts, heated water to motor front, hot water out thermostat cover (no t-stat) to the snails at the back of the logs to blow out the back.