It's August and you're at a show 20 miles from home. You've been sitting on blacktop all day watching folks ogle your truck. It is 98 degrees with 80% humidity. It's hot. Awards were just given (congrats by the way) and it's time to leave for home. You pack and jump in the truck for the long drive home. Look at that line of trucks in front of you trying to get out of the parking lot (only one entrance). The question is; do you roll up the windows and crank up the air or sit there and sweat? Easy question for me. I've been in that situation many times; some with cars with air and sometimes not. It's really refreshing to have that cool air blowing on your to calm you as you leasurely exit and drive home. You'll be relaxed and ready to clean those bugs off the grill before putting her away.
Crank it up (and I don't mean the glasspacks either). Check with Classic Auto Air. They have a good reputation. I tried Vintage Air and wasn't all that happy.