I'm not sure that there is anything wrong with your idea so long as you use high strength components. But, have you considered just replacing the ball joints with some from a supplier such as Howe Racing. They have a selection of components that will pretty much allow you to build your own ball joints to suit your needs.
Just a thought.
https://www.howeracing.com/
Ted
PS: I have their ball joints in my SPF and am very impressed with the quality.