Will a Stock 489 handle 700hp?

My 8 3/4 stock rear was making some awful noises when I was running High 11s in the quarter, probably bearings going out. Rather than spend more money on the 8 3/4 I built a junkyard Dana 60 because I had plans to make more power.

My car has recently gone a best of 6.27 in the 1/8th mile with the Dana 60. This is with Dr. Diff's truetrack and stock truck 3.54 gears. I do however run 35 spline moser axles.

Mine is also a street/strip car. I would just spend the money on the Dana and forget it. You will get addicted to going to the track and if it's a street car you don't always want to trailer it because you are worried about blowing up your 8 3/4.