FYI: I ordered a GCK axle from autzone a while back and had some serious issues. The shaft part with teeth that goes into the hub has a lip to it at the end towards the outer boot. When I installed it the lip would not allow the axle to tighten into the hub properly. This made teh axle loose and my wheel would wobble. I am not sure I am explaining it well, but ELKY and I installed it and ran into this problem. I ended up going with a remanufactured axle from autozone.
I wonder how badly I would need upgraded axles with my torsen equiped SVT making about 260fwhp?
