Reliving the teenage years.

My first practical "dream car" was the 68 Dart GTS 383 4 speed. Unfortunately it has always remained a dream. I am now looking for that dream to come true. Maybe a different year and motor but still a Dart. I haven't bought anything yet. I guess that makes me a "bench (Dart) racer".
I do have my eye on a Dart project car. I'm going to wrap my intro in with a question or two. First, there is a 75 Dart /6 auto in town that I have my eye on. Basic Dart,no air or power options. It seems to be very solid and is straight,decent interior, bench seat of course and seems to have been well kept. The lady who owns it now said it belonged to her mother, now deceased. She, present owner, looks to be in her late 60's. What would be a good price for it? Second, would it be worth more as an original or as a 383/440 clone car.The seat of my pants says clone but I would rather preserve a car than cut and paste ruining the as produced state. I have the parts to put in a 383/440 other than mounts and headers. Mini tubs and spring relocating are no problem as I have access to all the equipment and know how to do the job. I'm also ASE certified in eleven catagories.

Thanks for reading and input forthcoming.
Jack