A couple of new pictures

The ball joint extensions and heavier springs are easier, if you consider it's mostly a boltin, where an axle is a fair amount of fab work. But going back afterwards is not so easy. When you install the extensions you'll find the ball joint extension moves the upper control arm down, which also brings it inward. The inward move makes it closer to the frame, and it will hit the side of the bump stop that's rivetted and welded to the frame. If you don't take that bump stop off the frame it will eventually either break the extension, or crack the control arm. So it takes some cutting to remove it considering how Chevy put it on, and that's a bit of a chore, plus tough to go back later. I guess you can go back, and just not have that top end bump stop, as it's rarely used.
The really tough part of the ball joint ext. install is those heavy springs! They kicked our rear trying to compress them enough to get them into the location!