Random idea, and figured it is pretty relevant here...
I've never installed a block heater (just replaced one), but from hearing about others installing them you remove a freeze plug from the engine and install it. Would it be possible to have two block heaters? Or is there only one freeze plug that it can be installed in?
Having two block heaters might be useful where it gets to -30 (geeze thats cold!!!), and I'd like it so that it would warm up the car quicker (yes I know its pulling more power
) and get it to a higher temp. I really like the 90-100F starting water temp... would be nice to get it a touch higher.