When I got started on converting my 1977 50L Moby to a 50V I thought, "How different can they be?"
I found out that they are pretty different:
Front sprocket tooth count (L=44 V=54)
Back Sprocket tooth count (L=13 V=11)
Chain length (approx. L92= V=104)
Belt tension spring (V spring is much stiffer)
Spring retaining clip (V has a longer hook)
Hopefully this will save someone else some time.