You better get your scales out before you start adding weight. You want the weight as low as possible and have it contribute to your corner balance.
All race cars are built as light as possible. Weight is added to make it legal.
In NASCAR they actually take all the gauges out for qualifying and add the weight to the floor. They want the weight as low as possible. You just don't need gauges for a 2-lap qualifying run. Better to have the 1.5 lb bolted to the floor.
Richard Newton
Car Tech Stuff