Here's what I can tell you:
* The film was directed by: Eddie Romero, a prominent figure in Philippine cinema.
* It starred: Fernando Poe Jr., a legendary Filipino actor. He was known for his action roles and often played heroic characters.
Here's why finding a full cast list is difficult:
* Limited online resources: Information about older Philippine films, especially those from the 1970s, isn't always readily available online.
* Lack of comprehensive databases: There's no centralized database dedicated to Philippine cinema like IMDb has for Hollywood films.
To find more information, you might try these steps:
* Search for film reviews or articles: Websites like the Philippine Movie Database (PMDb) might have some information, but it's often limited.
* Contact film archives: Reach out to institutions like the Film Development Council of the Philippines (FDCP) or university film archives. They may have more comprehensive records.
* Use social media: Engage with Filipino film enthusiasts or communities on Facebook or forums dedicated to Philippine cinema. They might have additional knowledge about the film.
I hope this helps in your search!