I would bet some ingenious fellow could take soft copper tubing, wrap it
around the headers or cat, attach a length of plastic tubing to a second
Westy drinking water pump, and pump water straight out of the standard tank
to heat it. Not much good for morning shaves, but it would probably work
pretty well once the engine warmed up. I bet you could get at least 10 feet
of 3/8" tubing around those pipes, too. With a second faucet at the sink,
that would be a nice addition.