Focus - which model heater do you have? any of them will defrost well if the engine's warmed up -
the deluxe factory heater heats great in any weather - the factory
standard heater works fine in my 58, but I avoid driving much when temps are way below freezing to avoid getting munched by others - the
dealer installed heater I had in the 57 worked well for defrosting, not as well as the others for cab heat, but I've been comfortable with any of them around town or on the highway
what'll make a lot of difference is having some added cab insulation [peel n seal, etc], and letting the truck warm up before you move out .... and don't expect to feel like you're sitting in your toasty living room with the wood stove roaring
Bill
