Will a Stock 489 handle 700hp?

When I bought mine it was around $1950 delivered. I considered going the truck housing route but decided not to. I don't have or know anyone local that has the fixtures to narrow one. The S-60 housing is lighter and it has adjustable spanners on the sides that make gear changes much quicker and easier. While I was waiting on the rear end I finished the mini tubs and relocating the springs into the frame.
How many times have you change the gears?..