I drove a 68 GT in college and afterwards, it ended up becoming a GTS clone with a crossram that I sold with the car, they added the 340 and has been seen for decades at the Mopar Nats and many pictures of it sold. I also drove another yellow 68 Dart GT convertible for years, I still miss both of them!
I lost out on a 68 GTS convertible that was blue/blue automatic, a friend ended up with it and restored it. Let me know if you need any parts, as I have parted out several Dart verts.