7 1/4 rear end hold up?

I am going to be getting allitle $ to put into my 72 dart and am wondering if my 7 1/4 rear end woulkd hold up to 455hp and 500 lbs torque if babied. I dont have enough to get a motor and a rear end and am trying to do things in order but the conflict is im in a hurry to drive the car again. advice?
So you're trying to tell us that you have 455HP and you're not going to jump on it even once? :-) Like I've said in the past....those rears are like a grenade with the pin pulled... it's not a matter of if, it's a matter of when....