I'd certainly leave the heater and all related components installed and in place.
It's as easy as this to prevent unwanted heat from the heater... just add a simple shut off.
British Motorcars of New England
Check on the photos every now and then... all free for download, in all sizes.
The British Motorcar Festival Bristol RI:
Photographs - For your computer
A BMCNE Cruise:
Portsmouth & Aquidnik Island, RI
Heater Bypass Plumbing
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