Dana 60's are C-clipped, unless there's some wierd semi-floating rear dana 60 out there.
But the lock-rite is a good tuff little SOB, I beat the hell out of mine (off road) in my front d60 w/ no problem.
Driving a truck with a welded rear on the street every now and then ain't no big deal. And I don't really mind the tire drag, but it simply eats the tread off the rear tires.
No front axle is c-clipped only most rear semi-floating axles, no full floating axles will be c-clipped, the hubs keep them from sliding out up front.