[PaulProe]

You can substitute the aluminum housing from the Mark VIII or Cobra. If you use the Cobra differential, be aware it has 31 spline internals, the MarkVIII has 28 spline. But very few of the Mark VIII's came with trac-lok so you might be looking at new internals also. Dusty has done this before for other customers. Not a big extra. The half shafts supplied are 28 spline. Some have converted to the 31 spline center section but it adds additional cost.

The extra strength of the higher spline isn't really necessary unless you plan to run slicks and generate in excess of 500hp at the wheels. If you're going to drag race the car, you might look into it further but for street use, the other is fine.

You can't go wrong with a Hurricane kit. It will accommodate as much or as little of customization as you want.

Paul