Be warned if you have never done the "Low and Slow" that it leaves a really strong dank smell in the refrigerator that can last a couple weeks after completion. My spouse was not pleased with me after trying this method.
I have an antique Philco (40's model, in the family since new), that I want to restore, and it works. Not a frost free, but I think it will work. Needs paint and a new seal, but will be good enough to low and slow (I think).