Shock tower bracing - like a Boss!
The shock towers in the 67-68 mustangs have a tendency to crack due to fatigue and abuse. The earlier ('65-'66) and later ('69-'70) shock towers are different designs and different shapes, and less susceptible to this issue. While some cars have cracks that look like the San Andreas fault that you can see daylight through, all I found is one little crack in the bottom of my drivers side tower.
Just to reorient ya'll where we're working -