I'm going OT to make a point...
We have made over 330whp on a stock 1.6L Honda motor...beaten daily for 4 years without issue. How? because we took our time and did it correctly. Countless thousands of other enthusiast's have done the same with some making 500+whp. However, some choose to throw 5K+ into their motors to make the same power simply because the interweb fools told them they needed to do so. Should I have wasted my money as well? It's a common theme I've witnessed over the past 12 years with ALL aspects and facets of motorsports.
I'll happily go on record by saying I would buy a used JK 44 for the front of my XJ before wasting any money on a 60 for anything larger than 35's. Why? Simply because I'm looking at the whole picture, instead of just falling for common internet pipe dreams. Do I need to justify my reasons? No. Do the real life research for YOURSELF, and come to your own conclusions!
Just like Cal had mentioned, if you want to build a 60... all the power to ya! Simply just make sure you've considered all the variables involved before shelling out your hard earned money, as there is a lot more to consider than just the strength of the axle.