[Chevyman63]

I think you may want to replace the parts on your existing axle. 1) It would be a good learning experience, 2) you have the ultimate resource, literally at your fingertips and 3) who knows how long the ones in your buddy's axle will last.

Just a thought.

But then again judging from the labor cost to have it done, it sounds like a real pain.

Tough decision...Good Luck!