Well, I did it. I installed a fuel-burning heater in my electric car.
I've been posting about it in the "Upgrading the Heater system" thread.
[url]http://myimiev.com/forum/viewtopic.php?f=14&t=1248[/url]
I did it over the better part of a week, as I could, depending on my schedule and what the weather was. Temperatures lately have been anywhere between 0-18 degrees Fahrenheit. (-18 to -7C) I've tried working on the car when the sun would come out. It's pretty amazing the difference in heat when you can be in the sun and out of the wind, even on a very cold day.
Overall, the installation was pretty straight-forward, other than the fact that I've never done anything like it before. Mostly, it was nuts and bolts, connecting hoses and tightening hose clamps, running wires, and zip-tying things in place.
I wasn't able to find a correct sized/affordable fuel tank locally, so I mail-ordered a one-liter tank, as might be used on a mini-bike or small go-cart.
I have a complete series of videos on the installation on my fuel economy blog at: http://300mpg.org/imiev-heater-installation/
See all the videos and more photos at: http://300mpg.org/imiev-heater-installation/