I would think any and all weight savings add up. Even removing some springs from the seat frames. Just because it has to look stock doesn't mean it has to be. Gutted radios, smaller battery hidden in larger case, aluminum brackets, drill holes in the doors and rear deck, thy will be covered by door panels, and package tray. The lighter you make it, the more weight you can add in the rear to make minimum weight and help with launch and traction.