The jetting on the dyno is going to be different than what the car will want on the track although it should be a good place to start. Your car isn't moving when on the dyno so it won't allow for variables you have on the track such as fuel sloshing and the effect of the air coming in the scoop.
200 HP loss from the crank to the wheels sounds like a lot. I know there are a lot of things to take into account but I was under the impression that there is usually a 15% to 20% loss on most race cars. 200 on yours would be closer to 30%. Of course there will always be a difference in the numbers from one dyno to the next.