Will a Stock 489 handle 700hp?

You can break about anything.... but odds are way in the favor of a S60 surviving your 700hp goal. The factory put D60s behind big block stick cars. These cars paled in comparison to your H.P. goals and were on a skinny rock hard tire.

...and don’t cheap out on your trans either. Chuck the stock front drum for a billet piece. That way when you shuck you’re 8.75, shock your sprag, the drum won’t explode incurring even more damage in your life. :)