Greetings new to the forum!
I own an english FORD 5000 diesel 1976 i have changed the original engine after two block cracks and i have placed propably a bsd engine around 85hp (6610 or 6640) the new engine has this two idenfication codes FO NN 6015-CB & HH3 4 A 06.
I know that FO means 1990 NN...