Ya, in louisiana its steaming hot.. but in the winter.. its gets ...really...really cold down here.. we're talking mid to low teens sometimes.

I'm running a b20vtec's nonvtec waterlog.. which only has one nipple, where as the itr/gsr waterlog have 2 nipples.
Now from my research i see that non-vtec motors have a extra nipple on the thermostat housing.. would i be able to use this or would i have to swap the waterlogs to run a heater in the car.. reason say is i have the side port on the head blocked off now..cause i didn't run a heater before. But while the motor is out of the car this is something i need to address before it gets cold...can i just swap the thermostat housings?
The thermostat housing i have now is off my itr, which only has one nipple.


Non-vtec thermostat housing



Vtec thermostat housing