The outline looks alot like my car except mine isn't an R/T. My car was original engine and transmission. The key to the value of the car is does the whole drive train match? Is the engine usable or blown? What parts are missing on the car that should be there? My experience is it costs alot to have a car like that. Even if you don't keep it a numbers matching vehicle. It would be easy to drop $40K into the car fixing it up. The money I've put in my car in 1999 could have bought me an Iroc and the money I'm spending this year would allow me to buy a 2008 challenger. The joy of driving a car like that in good shape is beyond words. To get it to that kind of shape few people who don't love that particular style have it in them to do (skill, money, will power, etc.).
On the other hand a car like that will increase in value just because not everyone can have one and once they are gone you won't be able to recreate it like you would a 1969 camero or 1965 mustang. In the end the car is worth what someone is willing to pay for. Just making it safe to drive will increase its value significantly.
I have to agree with "MEK-Dangerfield"