Remember that the drive shaft in our Cobras is pretty darn short. With a solid rear, the wheel travel becomes a real issue -- you're going to bottom out your shocks with softer springs and you're going to have an uncomfortable ride with springs that are stiff enough to do the job. While it's debatable, this just might be the most sophisticated rear in any of the Cobra cars (it also gives you the beauty of outboard brakes):
http://www.erareplicas.com/427/frsusp.htm