Rear Interior Arm Rest / Quarter Panels Between Models

Are you trying to put conver plastic in non convert?..

My understanding is the dart convert will fit the barracuda convert but where the dart is flat on top the barracuda is slightly curved so the trained eye will notice.
Other way around. My '68 Convertible came with broken panels. Have found a '67 Notchback donor car that I'm harvesting the trunk lid from (after 3mos of searching). His panels are in great shape, hence the question. I'd hearc about the Dart ones with that small difference, but if I can fit the original form factor in, I'd prefer it.