FE 1.0l petrol:
F10S short body, softtop
F10SK short body, softtop, steel doors
F10J long body, softtop
F10JK long body, softtop, steel doors
12R 1.6l petrol
F20S short body, softtop
F20SK short body, softtop, steel doors
F20J long body, softtop
F20JK long body, softtop, steel doors
F20JKB long body, resin top, steel doors
F20V metaltop
F25 pickup
DG 2.5l diesel:
F50J long body, softtop
F50JK long body, softtop, steel doors
F50JKB long body, resin top, steel doors
F50V metaltop
F55 pickup
DL 2.8 diesel:
F60J long body, softtop
F60JK long body, softtop, steel doors
F60JKB long body, resin top, steel doors
F65 long body, pick up
Long and short body only differ in rear overhang, wheelbase is the same
There were also different trims, any D in the designations (found on the identification plate in the car) stands for a deluxe version. An M in de designation stands for the 5sp manual transmission.
Parts mostly differ in case of the specific roof types (attaching holes and lips for the folding windscreen)
In 78 there was a restyle of the front (Chrisf20maniac over here has one of the pre 78 models), body panels are not interchangeable
In 82/83 another restyle took place. this only changed the metal grille into a plastic one, but aother parts are stil interchangeable (I've got a late 83 model).
Hope this will be of use.
The other fellas over here can probably complete this list with rockies and ferozas
edit: forgot to mention that seating arrangements were standard only front and the resy could be ordered as an option i guess. I've some drawings with a short model f10 as a 6-seater (benches facing sideways). Boy, would that thing go uphill fully loaded