Not to hijack your thread but I could also use a coiuple dimensions for the shock towers,both across like you are looking for and front to back to some reference point.Hopefully someone can help.
On a 75 Duster I got 33 7/8 center to center of the holes.
Passenger side - center of shock hole to flat just below the blower 13 1/8
Drivers side - center of shock hole to the high vertical 'ridge' next to MC 12 9/16