70 Dart Custom GT Package in Crazy Plum

Hello to you all, I've searched the threads and the internet and i can't seem to find any good information regarding this car I found. According to the fender tag, it would be a '70 Dart Custom with the GT Package in Crazy Plum colour with the 318 engine and 3 speed automatic. The car is fairly rusted, to the point where I would not use the shell and frame...But all the original drive train is present as well as the interior. But everything is in rough shape and would need major work. My questions are the following:
1-Is this car rare?
2-Is it worth it to save it, assuming I find a shell at a decent price?
3-Any restoration garages you could suggest would be great, as I do not plan on doing the work myself...not enough knowledge, tools or space...
Thanks,
Donald