Mustang Cobra IRS in an A-body

I've also looked into this for my 5.7L '67 Dart project.

I'm not sure of the strength of them, but i've read that the 1968-1982 Corvette rear end is 59.5".

Here's a '72 'vette rear upgraded with lateral links and mono-leaf spring...



Off topic...
I just picked up an 8.8 Ford Explorer solid axle with factory disc brakes, 3:73, and LSD for $240. It's 59.75" hub to hub. I even came with the e-brake cables and brake lines/brackets to the body. I figured i'd save $ for a RMS front K-member.