4 inch springs, longer shackles, body lift.
That looks like probably 4 inch springs and a body lift.
My Scrambler had 4 inch springs and 2 inch shackles. Drove perfect. I ran 35 12.50 15 on it.
The biggest problem is Flex you don't have that coil springs give you.
You just need to "tweak" those leaf springs a bit. (YJ)