Front Spoiler - 70-72 Dart/Demon

Any possibility to slot holes or otherwise make it vertically adjustable? Tapering the sides might allow it to "shrink" proportionally as it's slid up into the valence.

Also, any way to adjust the rake? For me, personally, I dig it but I'd want more show less whoa, so a little smaller and with more rake, but some want more function less form.