When do you need to provide a 1/4" space? Anytime you mount equipment to brick or concrete? Would you use some washers to give you the 1/4" space? I've never been called on this before, but it sure would suck if you were, and had to take it all down!
Most panels, boxes, gutters, etc. have ?" dimples on their backs so they're spaced correctly by default.
Untill the stucco guys get there.