[Build-It-Break-it]

I think you might want to consider cutting off the complete square tubing that supports that coil over and make another.

The way you have it takes the strength out of that shock mount and puts the load just on the 3/16th upper a arm mount. I think once the coil over starts to compress up and down its going to act like if you bent a coat hanger back and forth and shear that upper mount off.

That's a lot of weight and load to trust it the way you have it now.