[masraum]

Wow, young. I never saw any of her porn, but I did see "Rabid" from 1977. Based on the list on IMDB, it looks like she was still doing some.

# Porndogs: The Adventures of Sadie (2009) (post-production) (voice) .... Sadie

# Solitaire (2008/I) .... Cop
# Stash (2007/II) .... Mrs. Bookenlacher
# Nantucket Housewives (2006) (V)
# Naked Fairy Tales (2002) (TV)
... aka Marilyn Chambers' Naked Fairy Tales (USA: complete title)
# Little Shop of Erotica (2001) .... Marilyn
... aka Marilyn Chambers' Little Shop of Erotica
# Edge Play (2001) (V)
# Dark Chambers (2000) (V)

# Still Insatiable (1999) (V) .... Sandra Chase
... aka Marilyn Chambers Is Still Insatiable (UK)
# Sextrospective (1999) .... Marilyn
... aka Marilyn Chambers' Sextrospective (USA: complete title)
# Desire (1997) (V) .... Marilyn Martin
... aka Marilyn Chambers' Desire
# Incredible Edible Fantasies (1997) (V)
# Fantasies Vol. 1 (1995) (V)
# Lusty Busty Fantasies (1995) (V) .... Marilyn
... aka Marilyn Chambers' Lusty Busty Fantasies (USA: complete title)
# All My Best (1994) (V) .... Marilyn
# Bedtime Fantasies (1994) (V)
... aka Marilyn Chambers' Bedtime Fantasies
# New York Nights (1994) .... Barbara Lowery
# Breakfast in Bed (1990) .... Marilyn Valentine
... aka Private Screenings Presents Marilyn Chambers in Breakfast in Bed (USA: video box title)
# The Marilyn Diaries (1990) .... Marilyn

# Party Girls (1989) (V) .... Marilyn Saunders
... aka Party Inc. (USA)
... aka Party Incorporated
# Insatiable II (1984) .... Sandra Chase
... aka Hell on Heels (Europe: English title)
# My Therapist (1984) .... Kelly Carson
... aka Love Ya Florence Nightingale
# Private Fantasies 4 (1984) (V)
... aka Marilyn Chambers' Private Fantasies 4 (USA: complete title)
# Angel of H.E.A.T. (1983) .... Angel Harmony
... aka Angel from H.E.A.T.
... aka The Protectors, Book 1
# Up 'n' Coming (1983) .... Cassie Harland
... aka Cassie (USA: cable TV title)
# Night on the Town (1982)
# Insatiable (1980) .... Sandra Chase

# Beyond De Sade (1979)
# Never a Tender Moment (1979)
# Rabid (1977) .... Rose
... aka Rage (USA)
# Resurrection of Eve (1973) .... Eve Goodman Paradise
... aka Mitchell Brothers' Resurrection of Eve (USA: video box title)
# Behind the Green Door (1972) .... Gloria Saunders
# Together (1971) (as Marilyn Briggs)
... aka Sensual Paradise (UK)
# The Owl and the Pussycat (1970) (as Evelyn Lang) .... Barney's Girl

What really got me from the original post was "more polished sex films of the 1970s". That's scary.