Small update:
Before I get the roll cage built, I needed to get some specialized parts. These are some parts I had turned then lightened up myself. There are 2 cups that bolt onto the back of the front suspension subframe allowing the front subframe to be bolted to the roll cage.
Then 2 sets of male/female attachments that will allow the rear subframe to be bolted to the roll cage. They will be welded to the top ends of the front vertical tubes.
Jason