Gr, the Leece-Neville / Prestolite generator that the TM you refer to is for, will be interesting to retro fit. It is a monster! I thought those were 14 volt? I do not recognize it from any of the military vehicles I have seen. gm will probably recognize the style, but I am not sure I have ever seen it used in vehicles I have seen at the shows.
Keep us posted with some pictures, this will be interesting!