Real GTS or not.

Hi guys. I need some help finding out whether my 68 dart GTS is a clone or genuine. I purchased the car knowing that it has no fender tag or door tag. The vin confirms it is a true 340 car which would make it a GTS right? Is there any other body stampings that would match the vin somewhere on the body that would confirm that the dash just wasn't replaced to make it look as if its a real GTS? I hope i'm not confusing anyone here. Any help would be great. Thanks.