Actually think it might be here.
Based on the location on 1939 Hpkins map of the "Superior Auto Accessories" which can be seen in the photo across the street.
Also, there's a line in a Robert Johnson song about "that Good Gulf gas" Always though it was from an ad, apprently it specified a grade?
I think "Guys and Dolls Cocktail Bar" in the distance is now Toast Wine bar at 5102 Baum Boulevard... maybe?
So this photo was taken at a corner, and if it is looking at Superior Auto Accessories on the opposite side of the street then it has to be looking west. So then it seems like the only corner that works is the corner of Baum and Cypress, as I've tagged it here. But my tag makes less sense when you consider the "Guys and Dolls Cocktail Bar" Not sure which is better?
By the looks of the building on the right, and the houses down the block on the right, I think it's Baum at Roup.