Automatic or manual?

I have 74 Charger with a 383 60 over pushing about 550 hp. I have a 727 3 speed with a manual valve body. Should I keep the automatic or switch to a manual? I do plan on running it so the setup I have now is ideal but I enjoy driving stick and I think a muscle car like that should be manual. Another thing is if it's manual it's going to be really hard to keep traction considering the amount of power in a rw drive car. Give your opinion on which I should choose and the reason for it