Old thread and I don't know where Bruce Lee took his influence from officially.
What I can tell you is he spent a lot of time with Ed Parker and training with his students. Not formally as a AKK guy but fighting and discussing philosophy and taking it too the mat.
He also worked with Gene LeBell on set and off, so I'd be hard pressed to believe he didn't tap that resource when he was around him as much as he was.
I've heard the old timers tell a few stories. I won't repeat them because stories tend to take on a life of their own depending on who the tellers are, but they are interesting in their own right.
I will say the common thread seems to be that LeBell was not a guy to messed with, not ground breaking I know, but the stories are still funny.
Undefeated in all of Asia!