Gen2 Barracuda Convertible vs Notchback Rear Ends

Just went through the moment of truth with my '68 Barracuda convertible RestoMod project by having the body sandblasted. BAD NEWS -- the rear was a bondo cover-up of a light rear-end accident that requires replacement of both rear quarter panels and the lower valance. Estimated body work before paint (including driver door skin replacement) is $10K minimum.

QUESTION: Aside from the light assembly and trunk nuances from year to year, does anyone definitively know if the rear clip of the cars (convertible and notchback) across the years could be interchangeable? Idea would be to weld-in a fully intact rear using full or partial quarter panels on backward.

The rest of the car is in great condition with no rust at all so trying to find a cost-effective way to keep the project alive and appreciate any insights on this