Rear sway bar options with relocated springs and ford 9"

It is for a car a friend is building. The car would just be a cruiser. He says he wants a rear sway bar but that there are no options for relocated leaf springs, I found the above Hellwig e body one which would be more than enough for the application but it's not clear if it'll clear the differential of a ford 9" vs the differential of a mopar 8.75.
I think at this point the bar isn't "necessary" but it's just itch to want to balance things out since the front is going to have sway bar.