Differences between 67 and 68 darts
the SS hemi darts were made out of GTS 383 cars... then they used 270 door panels and a100 seat...
there are some brackets in the trunk that are non existent in the 68 cars, the tail light buckets (in the body) need to be modified to fit the 68 bucket in there...
as said round marker lights on the rear (the factory didn't use them in the front due to the glass front end)
this is just off the top of my head but if you want to call tomarrow greg can get you some more info
www.ssandafx.com 623-465-7277