Will a Stock 489 handle 700hp?

What's it to ya?

At least I have a brain I am doing something with.

Low end torque is harder on the diff than 700hp at the top. I have had outstanding results increasing low end torque. I'm just trying to stay safe, that's all. Plus, I never, ever, ever said it would increase it by 200. I have been trying to get it dynoed to find out. I increased the torque by 75 ft lbs in the range between 2000-2500 rpm.