I thought you might find this photo interesting. I came across it a while back. It's from 1968.
Like you said though, the musculature isn't really visible in costume, but it may be of some help when refining your mannequin.
Originally posted by Durasteel Corporation@Feb 27 2006, 06:54 AM
...in that photo Ill bet money he is super dehydrated and hungry.
1968---how old would he have been ?