I see no one has responded.
The 33s are similar (very) to the earlier Alfasuds and Sprints and with the early 145s and 146s. There is an awful lot of parts interchangeable through all these models.
I imagine your 33 is twin carb (weber or delorto, 36 or 40mm). later models were fuel injected.
Anything in particular you're wanting to do?
(and if you need parts and are in the South Island let me know, I have two 33 parts cars).
Alfetta GT twinspark project, Alfasud Ti, 3x164s, 4x156s, 147, 166, plus parts cars.