The official documents for homologation at FIA....
The official documents for homologation at FIA. https://historicdb.fia.com/sites/default/files/car_attachment/1486760402/homologation_form_number_18_group_gt.pdf
very interesting document - what is is used for, how does this relate to the build sheet, and how do you get one?
Homologation papers establish specifications(when approved, by group classification) for the model to compete in FIA events. A competition car of that type should have the same specs/equipment on the Foglio di Montaggio. You can print this from the link, original copies turn up from time to time in auctions, etc.
On the aforementioned website you can find the complete FIA homologation documents of hundreds and hundreds interesting cars, not only of Ferrari's. I would say, print out or download all these that catch your interest. Imagine they remove all this great content from the net.