He was going to play George Spahn, the 80 year old blind dude whose ranch the Manson people basically hijacked.
On a hilarious note, Damon Herriman--the "TUCKER!!!! TUCKARRRR!!" meth addict from Breaking Bad's "Shotgun" episode (the one with Jesse and Mike tooling around doing drops and Jesse inexplicably becoming smart--will be playing ol' No Name Maddox himself, Charlie Manson.
I forget if Dennis Wilson has been cast...