I have shown this before. I put 2 ceramic resistors in an electrical conduit box to capture their heat for the defrosters. They are wired so I get 2 speeds at the fan.
34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.