How cold does it get there? Cold weather does not mean the same to everyone. To me cold is anything below -25
what do you have the high idle set at?I was told all super duties have the block heater and that all you need is the cord which can be found on amazon pretty cheap. You certainly do not want to ever experience your fuel gelling up, but if you do you will have to change the filters. Depending on how bad it is you may need to pull the truck into a heated shop or cover it with a tarp and run a heater under it. The high idle mod is my best friend in the winter and I would highly recommend doing one.