In addition to our EG-1771 Big Block Ford Thermostat Housing, we now have this new Thermostat Housing for your Mustang (or any Big Block Ford) without the threaded port for any emissions equipment.
This is our part number EG-1770. It's a great alternative if you are running a "clean" set up without the factory emissions equipment. It will fit any 67-70 Big Block.
Like our other Mustang thermostat housings, this is a quality piece made from pressure die cast aluminum.