Which kit?

thats 20 pounds of sprung weight isnt it?...that wont help at all? The wheels wont take more hp to turn those big o drums. I will be going with lighter wheels for the track as well. And possibly lighter drive shaft. My thing is, I already built the motor and I cant change it. The only way I would change it is if something happen to it. Meaning I cant make the motor have more power or torque, so in order to go faster, I need to lighten the car every possible way while still being safe.