1964 Valiant "Get Runnin & Drivin"

Yeah, I'm in the same situation. Can only work in the mornings before the garage gets too hot.

I do have one of those portable A/C units. It has the exhaust hose on it and I cut a hole through the side of the shop for it. It works good after the sun goes down, but won't touch it during the day with no insulation in this metal building.