To convert the chrome taillights to 1966 specs, I use the chrome taillights, but strip the chrome off before I reshape the part so they're individual taillights, and not the traditional part. I also drill out the center of the taillights, paint them with Tamiya TS-17 Gloss Aluminum, or Tamiya TS-30 Silver Leaf, and then spray a final coat of Tamiya TS-74 Clear Red, to give them a more appropriate look. Once the paint has dried, I take a sewing needle, and rub the inside of the hole with 5 Minute Epoxy before I insert a suitably-sized piece of aluminum tubing into the hole that I've drilled using a pin vise. For 1965 specs, I would remove the piece in the middle that makes them look like they're molded together, and reshape the ends that were cut to blend in with the taillight, strip the paint, prime them, and then use the same combination of Tamiya sprays to paint them.