Dart >>> demon doors

To muddy the waters even more..
I have a 73 Sport with bad doors and a 73 Swinger with pristine doors. How much headache am I looking at to transplant the Sport guts-n-glass into a Swinger door?
that was going to be my next question so thanks for bringing it here. I have the opposite, a 73 swinger that can use a door and all I have on the pile is a 75 dart sport door