They are all about the same, including the Malibu as well. All the same frame, chassis, overall same dimensions, and gutted out to be a race car, they all can end up about the same. The only difference is that some models and years do not currently have lightweight body parts being made for them. But I plan to change that. Within the next few months, Ultra-Carbon should have every body panel for every 78-88 G-body available in carbon fiber. That will level the playing field and make ALL G-body cars equal.
PM me if I can help you with any parts.