Heater hoses disconnected?

[Falcon 269]

Scan down to the addendum photo on Pat's article about this:

http://www.cartestsoftware.com/fz1/carbc...ypass.html

This routes the coolant flow straight back into the rad.  If the one-way valve fails, you won't risk losing coolant through an open carb outlet.

You can cap the carb coolant stubs or leave 'em open, makes no difference.