My '48 is parked outside and I can put my frost plug heater on a timer. 4 hours even when it's 0 deg is enough for me. If it's -15 to -20 deg, I give it more time but not overnight. The heater is under the intake manifold, right where the heat is needed.

When it gets really cold, I'll put a magnetic heater on the oil pan overnight.

Missoula is in "tropical Montana" so -15 might happen only once a year.


1948 3/4-Ton 5-Window Flatbed Chevrolet

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.