As I figured, this would be a hot button and emotional topic. My personal view is a bit varied and I am sure controversial to some, but I personally feel that so long as you are not putting another car on the road (as in you are taking 2 to build one) I am not overly concerned. Now, I will say that IMO if you are taking a 318 car and using everything from say a TA or AAR (and I mean everything possible and what the car had when it was built); again I am not overly concerned about. Having said all of that, it comes back to disclosure; if you did what I describe and then display, market, show it with that story and disclosure, I have zero issues. If however you did that and then tried to bury the fact and present the car as having been born that way to a buyer; I feel that is fraud. Point here (for me) is that I would rather see a rebodied TA, AAR, 6 pack car, hemi, etc brought back to life than not. If the rebodied car brings more money than an original and all the cards are on the table, so be it.
There are many instances and examples of rebodied cars throughout history, in fact there was a time when it was common place. I don't think this really became an issue until the collectors and investors got involved and then it was more about value than the cars. There seems to be this huge issue that a rebodied car will dilute or harm the value of others that were born that way. Given the nature of Mopars, there is also a big concern about adding options during the rebuild that may not have been present in the original thus seemingly artificially increasing its value. To this issue I would say the car should be worth what someone is willing to pay. If the seller doesn't disclose the car is a rebody or the buyer doesn't know any different or do his/her research, then problems will occur.