Not everyone's cup of tea. 71 Demon

You could always a add a 1/8" reinforcement plate tie the sub-frame connector to the rear spring hanger if there is any doubt.
I reinforced both side after those pics were taken. It's probably stronger now than it was before.
I figure it can't be much worse than some of the drag cars I've seen.Screenshot_2017-03-23-14-24-28.pngScreenshot_2017-03-23-14-27-55.png