Help Decoding VIN, 69 Dodge Dart GTS

I have been off of the forum for a couple of years, but I am back in the hobby. Please don't let me make a $40K mistake on a potential purchase. The 69 Dodge Dart GTS that I am looking at has the following VIN tag. Can someone help me decode the info on this? If so, I would be grateful. Thank you! Also, how difficult or easy is it to take a Dart or Dart Swinger and rebadge the car into a GTS?

vin tag dodge dart.JPG