Technical identifying a block

I need info on a V/8 flathead block I just acquired,the tag rivited to the bell housing has a number that starts with an upside down V and has the numbers 4183,the bore measures 3.10 and the heads have 24 studs,I know it is a ford or Merc but what year?

 

MOST likely, a 38-41/42 Ford 221 CI engine

 

Standard bore would have been 3.0625 for Ford of those years.

 

This thread should help identify your flathead http://www.jalopyjournal.com/forum/threads/ford-flathead-block-identification.594463/

 

Thanx,38 coupe.I remember that from several years ago.