Join Date: Mar 2010
Location: Melbourne, Australia.
Yes Alfa won't have the engine number in their records. All they can say (via Fusi records) is the engine number 'range' for a given year.
As far as no engine number on your block, as mentioned could be a replacement one. You have not told us where you are located but some other possibilities,
.Stolen - block may have come out of a stolen car or maybe a written off car so number was 'erased'.
.South Africa - my Super came from SA during the export bans (as a consulate car) and all identifying details were 'erased' to hide its origin.
Finally the head casting mark may help you ID the engine (this is at the front of the head - just above the water pump)
i've attached a pic.
'74 2000 GTV - Robinia Metallizzato, '73 1.3 Giulia Super - Giallo Prototipo, '68 1750 S1 Berlina - Verde Oliva Metallizzato