If weight or lap times matter, I'd consider it. However, if either of those were true, you could probably classify the vehicle as a "serious race vehicle". Sine SRVs are generally huge pains in the a$$ to drive on the street, you usually don't, and thus cops are moot, crashes are moot, insurance is moot.
If this is for a street car, I see fewer genuine applications.
On my car (which I have
corner weighted) my f/r weight ratio would go from 56.7% front to 56.2% front by losing 35 pounds in the front. As part of an ongoing weight reduction plan for a rally car, it's progress. For a street car? 0.5%? I would imagine you would see more results from more practice driving, or spending the same money on a driving school.