Well according to the time his legs were in perfect proportion to his body.
Personally I would hate to look like a pro body builder these days, not that it would ever happen without gallons of gear anyway so no concerns there.
Personally I prefer the look of the body builders before gear, here is an interesting article about proportion, with some intersting theories and calculators that some might find handy.
Bodybuilding.com - Know Your Measurements For Bodybuilding Success