vibration problem

so i havent been able to find a shop who was willing to "balance" or even look at my brake drums... i havent been able to find a reman pair either because i have no idea where the 8.75 rear end in my duster came from...

I did however hear from one guy that a bent axel would throw out the symptoms alot are chasing here... now if thats the case, what kind of torque would it take to bend an axel in a rear end that big???