I scrapped my last S a mk1.5 but before I did I removed some parts as spares. I also removed the lpg system.
My replacement was a 55 plate Facelift, then refitting the lpg system I found lots of differentiates i.e the small panel on the dash which housings the fuel/boot release, size of spare wheel well, carpet and all trim in the boot, and V6 cats.
Also the doors are different, if your going to swap one you must fit one from the same year! I'm changing one soon!
And today just found out today the horns have different plugs (due to my high tone one has stopped working) !