the Camaro spoiler is cheaper, not "correct", but works well...it helps you steer the car at speeds over 75-80 MPH (by pushing down on front tires)
FWIW, were they available as a dealer installed option?
1968 400 Coupe, verdoro green, black vinyl top 1968 400 Convertible, verdoro green, black top 1971 Trans Am, cameo white, auto 1970 Buick Skylark Custom Convertible 350-4(driver)