After researching it appears that most people replace the alternator via pulling it out from the top. I am curious if anyone else has had success in doing from the bottom as outline in this youtube video for a GX470, which I assume should be the same as 4Runner V8?
https://www.youtube.com/watch?v=1ezNyD2zFjU&t=315s
https://www.youtube.com/watch?v=1ezNyD2zFjU&t=315s