No, this is the common mis-belief and doesn't fit in with Ford coding structure. It is a bit like GPW where many people misunderstand it as General Purpose Willys when is actually means Government 80inch wheelbase Willys (Source='All American Wonder' vol 1, page 21). I have asked the Early Ford V8 club for help and I will report any findings. I have looked through my Ford manuals, but cannot find anything yet. Please note that Ford US and Ford UK varied in vehicle model codes, so be careful.
Another point is that ENFO does mean ENglish FOrd, but there is no reference to this before 1950 so it cannot be wartime.