Well I was hoping an Aussie for the back then switch it to the front when I got another locker for the rear. I was on Aussie's web site and saw they make one for 27 spline but that must be a printing error. I haven't heard of a 27 spline ford rear end but I could be wrong about that. I did email them about that but haven't heard back yet.
Gimme a couple of days to think about it, $410 seems steep especially when they are listed for $249, even with shipping and all from Aussie itself I think mike be cheaper. I gotta get more info before I decide.
Thanks for the input, good stuff to know.