There's a film I'm trying to find. Its definitely pre 1980, and is centred around Indians... I think either in canada or north america...

Is it something like sentinel??

Well, your question is exceedingly vague, so I'll throw out a couple of possibilities--

The Manitou from 1978, a very odd film with this plot: "A psychic's girlfriend finds out that a lump on her back is a growing reincarnation of a 400 year-old demonic Native American spirit." Starring Tony Curtis, Michael Ansara (a classic Klingon from the original Star Trek series), Susan Strasberg, Stella Stevens (memorable in her Poseidon Adventure role from 1972), veteran actress (from 1927!) Ann Sothern (these days mostly known as the voice from the camp TV series My Mother The Car), and, of course, Burgess Meridith, who was in approximately 64% of all movies in the Seventies.

Your other choice it Shadow of the Hawk with Jan-Michael Vincent, a film whose greatness is so obvious I don't need to expound upon it.