07 Sport Model Rear End Specs...????

So I have an 07 Sport with and LSD rear end. I'm looking to switch out the LSD to a rear ARB locker. Only problem is I don't know if the 07 sport model has the 8" Axel with the 12 bolt ring gear like the TRD offroad models and what ARB requires for installation of the kit...The rep over at the local offroad shop called ARB and they did not know if their kit would fit the sport model because they have never tried to install the kit on any Sport model before (Stupid answer!). So now I guess i'm stuck.... because I dont want to get stuck (Bad Joke). Anyways any info would be appreciated.
Thanx

 

Gotta bump the thread and hope some one has the answeres i'm looking for....?