Nice summary of the history of Kriya Yoga.
I was under the belief that Farsight worked on a Mahavatar Babaji project, but I searched and could not find it.
Kriya Yoga may help extend lifespan, however, Paramahansa Yogananda, as wonderful as he was(is), died at the age of 59. And I got the impression from his autobiography that he did like to eat.
Hydrogenated fats were widely found in our food supply back then so they might have contributed to his heart giving out so early.