Mine mount right behind the trans crossmember. There long. Robert evens runs the setup with the shackle, along with many others. Your center pin in your leaf pack is all that holds your axle in place with a shackled trackbar. I know it doesn't sound like much but alot of guys run them that way and have a smooth dd truck.
I've also seen unimog trucks run a torque fork in the front. Like one big traction bar off the front bumper/crossmember. It's ok to be different it all depends on what your going to do with it. A torque form could be made rather low-key as well( blend in look factory) front or rear.hope this helps!
Eric