Swapping out rear sheetmetal 1974 Swinger to 72

If you had nothing id say you need the 2 quarters the tail panel and quarter extensions and valence and thats it right? how do the trunk floor side extensions work from the 73 on? etc its the little stuff you dont think about that will screw ya in the end. how about the mount point for the 70-72 trunk latch? is that separate? if you are getting the stuff from junk cars id get it all...