The Mutations (1974)

Directed by Jack Cardiff. Starring Donald Pleasance.

IMDB

Massacre Mafia Style (1978) aka The Executioner

Directed by Duke Mitchell. Starring Duke Mitchell and Vic Caesar.

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Plus Bonus Trailer for: Gone With The Pope (1975) which was never completed but edited together for release by Grindhouse Releasing (click here for info).

Professional Killer (1966)

Directed by Franco Prosperi. Starring Robert Webber and Franco Nero.

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The Killer Elite (1975)

Directed by Sam Peckinpah. Starring James Caan and Robert Duvall.

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Deathsport (1978)

Directed by Allan Arkush, Nicholas Niciphor and Roger Corman.

Starring David Carradine.

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Barracuda (1978)

Directed by Harry Kerwin and Wayne Crawford.

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Up from the Depths (1979)

Directed by Charles B. Griffith.

Starring Sam Bottoms and Susanne Reed.

IMDB