Will a Stock 489 handle 700hp?

Looking at Dr Diff S60, the options are limited, I can't get Race Axles and go without a spool which I don't want. I want the Trac-Lock, but is the Trac-Lock going to hold up under track conditions? Also the Pro-Gears need a Spool, which I don't want, but I want strong gears, will the stock gears hold up under race conditions as long as I don't hook up with slicks?

So, w/o the race axles, without the spool, with the trac-lock, stock Dana Gears, will be about $2,500 after taxes. Someone above said they found one for $1,200. I'm guessing that was used?