IMHO it is WOT6 (long wheelbase, demountable cab, air scoops, front fenders).
Basically the differences are:
https://postimg.cc/MXrMb9M7
Although there are some WOT8s with WOT6 cab, are they produced so or are field mods isn't clear. So the wheelbase is the only sure ID.
HTH
Cheers!