There was gh in the 70's and early 80's.
there was gh in its current (most effective) synthetic form in and aroudn 83-84ish
before that, before they synthesized it they were taking it out of cadavers, but it apparently wasnt as effective, and was a LOT more dangerous
and they are whispers that around the time arnold was winning olympias he had GH taken from fucking monkeys
you can never be sure, growth hormone gives a physique a very distinct look........a look boyer coe does not have in his early pre-mid 80s photos like thie one i posted above