Originally Posted by Bureau602
So I traced the hoses from the rear passenger side under the bus to the rear drivers side up through the floor and down the passenger side to the front heater through the firewall and across to the two valves on the passenger side of the engine. Where do I need to plug the lines?
It's really not that hard, The heaters are in a loop, just shorten the loop to exclude what you don't want. What you want is out of the engine to the inlet of front heater, then from outlet of front heater back to engine. If you have a heat control lever on the dash, be sure to leave that in the loop.