1968 Dodge Dart Question/Help

Hi everyone,

I just sold my 70 Coronet R/T project that I hated to see go but with health issuies I know I wont get it finished.

I have found a 68 Dodge Dart Convertable and the guy is saying its a GT made into a 340 GTS clone.

What are the codes to tell if its a real GT?

I'm going through my books and racking my brain that just is not helping me make sense of anything.

I think I have found were the 273 was not offered in this year and if memory serves me right 67 was last the last year for that motor.

The motor in it as of right now is a 340. I have not called the guy but would like more info and the codes to make it a legit GT.

Thanks everyone.