I think Jake Gyllenhaall would be a great inclusion in the Tarantino universe. I was watching Blow Out recently (the film that directly inspired Tarantino to cast Travolta in Pulp Fiction) and thought there was a similarity to Travolta and Gyllenhaall’s performances of playing the burned out dude.
Not sure how Gyllenhaall would fit into this Manson story but don’t they seem good for each other?
Also, I’m a little nervous for Tarantino to be going into non-fiction territory here. The internet and culture-at-large has gotten completely insane lately with how historically accurate a film is. (See the controversy over The Beguiled excluding slaves, which pointlessly prevented people from watching a delightful trashy romance/revenge film.) Tarantino better proceed very cautiously in today’s sensitive climate.