in extreme weather, you need to add the diesel fuel anti-gel addative to the tank, but I bet at -50 you'll still have so much wax it will not run for more than a few minutes.
A garage would be the best solution. If you can't do that, and it really is -50 you'll have to find a way to keep the fuel lines and tank above 0 F.
Maybe you slap a Tanis heater on your tank
http://www.tanisaircraft.com/heaters.htmland add a "T" between the filter and the IP, and another one after the IP fuel return line. Between these 2 "T"'s add an electric fuel pump

- JC Whitney ZX277501 - pumping from the filter to the tank and a fuel shut-ff valve for when you drive the car.

Aircraft Spruce # 6749.
Power it with a 12v supply -

Whitney # ZX295810
When you stop for the night, plug in block heater, plug in the tanis heater, open the fuel shut-off valve, plug in the charger. This will keep your tank, lines, filter, IP, from gelling up. It should start easily once you put it back to the driving positions. maybe you wire all 120V through a GFI to one cord.