Paint and Body Decent Quarter Louvers And Install Question

[Varnish]

Hello, new to the forum and mustang 2s. I want to put louvers on my new '77 hatchback and wondering if anybody has experience with the stick-on mustangs unlimited:
http://www.mustangsunlimited.com/Mu...uvers-Pair-1974-1978-Mustang-II-Hatchback.axd

Decent enough compared to what is available? How were the originals attached and what material - were they metal or fiberglass?

Preferable to these abs plastic ones?
https://www.carid.com/willpak/abs-s...tml?singleid=9136508&url=3280546#applications

Thanks

 

[LILCBRA]

Those from Mustangs Unlimited look just like the louvers on my car. I don't know if mine are original pieces from the 70s or not, but I assume that they probably are. I bought them off Ebay years ago. I attached them with double sided 3M tape and they've held up for 10+ years.