Do you already run a high-pinion front? If not, doing an 80 front would cover all the areas you mentioned for strength. Bigger shafts and bigger birfs, and if upgrading from LP to HP front diff, ~30% more strength there too. Problem with doing any Toyota axle swap is that the money you spend getting it built is more than a 1-ton swap can be done, and the tons would likely have the same or better strength. (Not that you all didn't already know that. Just saying it aloud for discussion purposes) #1 factor that keeps me from doing the swap to 80 axles, which ultimately boils down again to money, is having to swap the crappy steering setup. Which of course means swapping to Hellfire or FROR knuckles for $1000 right out the gate.