Shivers movie poster

If you think you’re not afraid of the dark
If you feel nothing can shock you
If you say you don’t scare easily
If you believe you’ve seen everything
THEN SEE…
BEING TERRIFIED IS JUST THE BEGINNING!

From Wikipedia:

Shivers, also known as The Parasite Murders and They Came from Within, and, for Canadian distribution in French, Frissons […], is a 1975 Canadian science fiction body horror film written and directed by David Cronenberg and starring Paul Hampton, Lynn Lowry, and Barbara Steele.

The title treatment looks a lot like Tension, a bold condensed sans with a vibrating effect, made at Photo-Lettering some time between 1960 and 1964. In this case, though, the designers apparently started with Futura Extra Bold Condensed and added the shiver effect themselves, via a stretched halo made of horizontal lines. Compare to Tension in use for Shock Waves, another mid-1970s horror movie poster.