These bulbs look great with the formed FoMoCo logo, and they're a massive improvement over incandescent. A nice safety and usability upgrade if you're going to drive your Cougar at night (even if only occasionally). And the headlight relays needed to use the halogen bulbs are easily removed later (if you don't actually screw them down to the car) so if a future owner prefers authenticity over functionality/safety, it's easy to switch back to incandescent.
However, one of the bulbs I received only worked on high beam, not on low. Had to send it back for replacement.