The later fase II engines from 1971 to 1982 likely had a more conventional carburetor when it was new. I'm not familiar enough with the Ford of Argentina products to know for certain what they were equipped with.
Here is some info on the fase II engines in english for us USA folks that are not familiar with the South American versions.
http://www.curbsideclassic.com/cc-g...s-a-high-performance-second-act-in-argentina/
The 885 installation was likely done for practical reasons. Some one needed a good carb and that is all they had at the time. Unless they wanted some special form of air filter system for the truck.
Since fase II engines were not manufactured in the USA, I don't know of any source for parts or maintenance information. We would only have the equivalent to the fase I engine in the USA Ford Y-block series of engines manufactured from 1952 through 1963. or so.