My 1978 K5 blazer needs new ball joints. A friend and I tried to change them once already, but apparently changing the joints requires the Laws of Physics to be violated. I've been told that the axle must removed first. I've also been told there is some way to merely shift the axle around without completely removing it, to make space to remove the ball joints. Either way, that's the problem. We can't figure out how to get the axle out while the ball joints are still in place, and can't remove the ball joints while the axle is still in place....Catch-22. Clearly we've missed something! Can somebody provide proper instructions for how to change ball joints in a 1978 K5? THANKS!