If you're worried about authenticity I can't recall seeing feedback about ECS negatively. Every Mopar having body resto needs them, so its more about placement and callout (your BS might have a couple PN's listed). And NOS adhering is dependent on how it was stored the last decade or 4.
Yes sirThanks Guys. Just to confirm his is the ECS company you're referring to correct?
http://www.ecsautomotive.com/index.php