Well in my younger days I would plywood the car port and open the kitchen door in the winter to get some heat to rebuild my motor and work on my car.It probably got to about 30 to 40 degrees at best.
Now a days it's gotta be at least 60 in the shop for me to work on Winter projects.
Funny how things change when you get older. But like Brian I don't bust my butt like I use to when I was younger. I use to race every week end but only go about 4 to 5 times a year now.