[mongocanfly]

i have mine plumbed like the yellow lines show...it goes under the tb and into the water pump in the raised boss of the pump....I had to later change water pumps and the new pump didn't have this boss area so I drilled and tapped npt in the same spot....pump housings are thin so be careful if you do it this way...there is also a heater hose fitting that can be used in your top radiator hose..