When I moved from Beaumont Tx to Anaconda MT, all the local homies told me " Boy, you need to put a tank heater on that car!" (a 71 Ford Torino). I noticed all the car there had AC cords hanging out of their grills, so I did what I was told...
This was a spherical looking thing that was spliced into the radiator hose; plug it in and it would heat and circulate rad.water thru the block....worked very well!
What elevation are you at? Do you really think you need one? I am at 8500' and don't have them on any of my cars...never a problem. This is the "banana belt" compared to Montana where it gets COLD and stays COLD!
Are you making snow at WP yet? We sure have had "Colorado perfect" weather the past 2 weeks, but I'm ready for ski season!