Fwiw, my 10 bolt only lasted a few months behind a 9psi boosted 5.3 with 35's. Sheared the teeth off the spider gears.

 

As far as the rear end goes, get a good LSD like the true trac or eaton lsd. Aside from that, also look into the bearing cap studs and a girdle cover. Those three things have proven to help make these little 10 bolts pretty reliable.

 

this.

And I agree with what has already been said about the tranny.