Here's what I've found.
Photo was taken in Sao Paulo. From left to right there is Ary Leber, Ricardo Divila and Adu Celso.
I am going by what Google has been able to translate for me, as the site is in Portuguese.
"The photo is 40 years old and it makes me miss it, it was the year that marked the life of many "machine worshipers" including those in the photo, in a dark shirt I am Ary Leber, light shirt and pants patched Ricardo "Ingles" Divila, Sitting in the car Adu Celso. No one was famous yet, but everyone was happy because they did what they liked best. The photo was taken in front of Fittipaldi Veic. And Equip. In Carlos Klein Street in Socorro neighborhood in São Paulo, it was during the design and construction of the Fusca Bi Motor, and what few people know is that Adu, who was a friend of Emerson's, was a partner in this car, and was there accompanying the construction. The car was a Ferrari belonging to a collector who can not remember the name, and according to him, it was one of the two cars brought to Brazil by President Vargas for Chico Landi, the engine disappeared so he used a V8 engine from the Simca Chambord, the Rest all original. I do not remember what the model is so the puzzle continues ..."
I would love to hear if there is anything else known about this chassis.