Oh Jerry, you're being a sissy.
Where's your sense of adventure? Joking aside I have a 160 in my '38 and it gets toasty warm in the car. IMHO the deciding factor is how tight is your cab. If you're not letting a lot of cold air in you should be OK. I normally have to shut the doors on my heater and just use the bottom vents or it gets too hot. Personal preference I guess.
