To answer the original question:
Pix as follows:
1-M101A1/A2 standard body, outside
2-M101A1/A2 standard body, inside
3-M101A2 late body, outside (lifting rings, re-enforced, no fender flares) (on A1 frame!)
4-M101A2 late body, inside (re-enforced, wide fender wells inside)
5-M101A3 body...