Thought I'd share some research for those unaware.
Everyone's freaking out over the 2015 having independent rear, Well the Terminator beat it to it years ago.
Cobra IRS system vs the GT's live rear axle.
And to finish it the cobra's IRS system mounts like a solid rear so it can be transferred to any of the 94-04 mustangs and possibly more but it is unconfirmed.
However... It has exactly the problem I expect from the 2015's, Can't handle the 500+ Hp, It is apparently very common to break half shafts in the terminators.