Here, take this extra pair of gloves, my hands are starting to get a little sweaty.

I went out in the garage on Friday and it was 40°.  I went right back inside.  I hate to work when it gets that cold.  I resist stooping down because I hate how cold my clothes feel.  My hands don't work right, I fog up my face shield.  Fortunately, last weekend I ordered a 5000 watt commercial forced air heater for the garage.  I chose electric over kerosene or propane for a few reasons:

1) I don't like messing with carbon monoxide, especially if I forget about it and it runs a long time

2) I want to be able to leave it unattended and not always be thinking about what is near it.

3) I don't want to keep all that fuel in the garage

4) I don't want to keep all that fuel outside

5) I don't want nasty films, odors, or soot deposited on things

6) I don't want to worry about running out of fuel, or having to remember to go get more.

7) I already have 240V power in the garage

Anyway, I got the Stelpro RUH5 from Amazon.

It has a thermostat that switches the full 240V  I ran 3/4 EMT tubing down and put the thermostat just inside the door, so I can reach out and crank it on a while before I go out.  

I was worried about whether it would be enough power.  It seems to be; Tonight it raised the temperature from 40° to 48° in maybe 30 minutes.  I will seal some gaps out there to help efficiency.

 After I finished installing the heater I started cutting metal for the extra subframe mounts.  Had to add a block to get a shallow enough angle:

 I am getting better at drafting brackets onto square tube then cutting them out: