Yes... 'zeu' and 'zeus' are not necessarily from the same source.. Making use of 'Occam's razor' can yield unexpected discoveries.. You mentioned that all bikes were imported, but there must have been framebuilders in Venezuela?
I know if resources are limited, and you want to get the bike into usable condition, you make use of what you've got, regardless of 'authenticity' or period-correctness.. 'year-perfect' bikes are a collector's fantasy never achievable or even concievable in the past, except maybe for sponsored riders. My bike is not even 'decade-perfect'...It never was, nor will it ever be..
If spoke count is the same, you could use either set of rims, maybe swap the Ambrosio Balance onto the Athena hubs and use the Campag. Epsilon? A lot of work.. and you can bet that as soon as you complete it a pair of nice old rims will turn up, because that is the way the world works....