well you're right about barbells pwning the fuck outta machines, but still benching 350 for 20 reps at a bodyweight of around 220 or so 
but i suppose it's possible if he was doing them touch and go style and rather loose form
he also supposedly did dips for reps with 300 pounds around his waist
Ok, and against popular belief and I've said thisbefore, bodybuilders trained hard and heavy back then, it was more of a priority than drugs. They trained twice a day, everyday. At least for us,legs was was a 3-4 hour Saturday affair, as an example. Today, there is very little work ethic, the work ethic today is taking their next shot at a certain time.