Was bored today, so decided to try and repair this clamp.  Its the original from my 360 which has another painted and installed TC at this time.  
The original owner broke a bolt and then when he drilled out the new thread hole, it shifted too high.  

Ground out the old bolt, then filled up bolt canal w/alum best I could.  Was afraid to hit with too much heat as I didn't want it to resemble a basket ball hoop. 

I plan to put a heli-coil in at least one side, but I realized I don't have the center to center measurements.   If anyone has one handy, 
would appreciate the measurement.  Though I guess just a equally centered hole like the other one should do it.