I own an X77 Z28 with numbers matching M22 transmission, 12 bolt BV coded rear end (however 3.73 gears) and non matching motor (Generation II, GM Performance Crate 454 LS7). The car is hugger orange with a driver quality restoration. I recently bought a set of original GM rear quarter gills, restored them, but have not installed them yet.
Will adding rear quarter gills to an x77 devalue this car?