Front spoiler 70/71 Demon/dart

Always heard that the 67/68 Camaro spoiler will work and look good on the Demons. So i took a chance and found one on E-bay without mounting hardware for $33 Shipped. The valance on my demon is not mint and has slight tweaks so i figured ill try it out!! Also sometime in its distant past (over 25 years ago) it looks like someone drilled holes in it for maybe a air dam/spoiler! Here is the valance just removed, and new spoiler.