Blower. Case closed.
Get all the bolt ons like everyone here is suggesting. If you were drag racing, you having a good tire, auto, blower, and gears would give you a great advantage. Still, even though you won't be racing it, blower is the best way to go. Your motor, and auto tranny will hold up high 300s-low 400rwhp, with no problems. I'm sure you might have to do some minor tranny work, but I doubt it will be anything severe.
Get all the bolt ons like everyone here is suggesting. If you were drag racing, you having a good tire, auto, blower, and gears would give you a great advantage. Still, even though you won't be racing it, blower is the best way to go. Your motor, and auto tranny will hold up high 300s-low 400rwhp, with no problems. I'm sure you might have to do some minor tranny work, but I doubt it will be anything severe.