I'm going to be plating, and running a support tube to add strength where I notched the frame. Will get pictures as I go.you may want to consider doing a half sleeve on the inside of the tube, that looks like a big chunk removed.
With how limited head room is, I can't go any farther hahah. Hopefully it will be fine where it is.They look like they need to go a little farther. On car with short trailing arms, the top of the shock usually ends up being about where your head is when the angles are right LOL.......
Remember, your not measuring of the top of the arm, but the line from the arm pivot to the bottom shock pivot.