Best air flow in non AC trucks tricks

[truckin 79]

I am still working on getting my AC sorted out in the 79, so no AC yet. I went to the junkyard the other day and almost died of heat stroke, it was so hot in the afternoon and I did not bring any water. Anyway jump in the truck after paying for my junk after downing a bottle water from the vending machine. Anyway does anyone have a secret combo to max airflow in truck cab without AC? I usually open side vent windows, bottom vent doors and rear slider but that makes a lot of wind noise. I have also opened all the windows, vents, rear slider and bottom vents but air does not directly flow towards me. I think my best combo so far is passenger vent window, rear slider halfway open and the drivers window down about 6". The passenger side vent window seems to create a strong vortex of air.......well hot air but still air right at me.