1968 Dodge Dart GT Front Grill -> 1967 Dodge Dart GT

You cannot rework the rear quarters to fit the 68 taillights, unless you swap in 68 quarterpanels.

This is incorrect. My 67 has 68 tail lights and it still has the original quarters. The bucket has been reworked a little by the previous owner, but they are in there and not rigged up in any way. In fact, most people just think it's a 68 unless they check the VIN.