543 0R 505

I'm not nearly as knowledgeable of most of you serious racing guys, but I would go with the 505 for consistently consistent runs. More power is great, but if can reliably and consistently run the same ET, I'd go that direction. I haven't been on the strip in years, but I'll soon be an empty nester, and will be the grey haired "Old Fart in an Old Dart" on the local strip. On the street, torque is King.