Slant 6 Coolant Flush

Although this may be obvious, you'll want to remove the thermostat to allow the water to flow out, especially if you just do the hose flush.

If you plumb the circuit together, I think your going to want to flush the block with straight water to flush all the gunk out. You'll likely need to reconnect the radiator to do that. But, The plumbing you created might help you direct the flushed water into some receptacle rather then it just running everywhere from the thermostat housing.