What should be done with this 70 340 Duster

The piece everyone misses. can be held on one finger . Not hung , Held. That is how small it is. I have seen cars on here that are clones and they may not know. Also a 69 dart I know for sure is two cars. And the person had to know. We did it 25 years ago and used the back half of a blue car . Dart swinger in the black stripe was still blue. the car was originaly bright metalic green.

I'll give you guys a week. Here is a hint but its not seen in the pic,