Yet Joe Weider wanted Arnold to lose a lot of his mass when he came over to the US and weighed 250-260 pounds. He lost in 1969 to Sergio when he weighed 250 and was forced to lose 20 pounds and step onstage at 230 pounds to win his first Mr. O in 1970. Not sure how much guys were pushing mass when you had lean bodybuilders like Robbie Robinson, Frank Zane, Boyer Coe, Ken Waller, Bill Grant, Serge Nubret, Albert Beckles, etc.
Wasn't so much mass, but they didn't want too lean. You had guys writing articles with titles like "An Overdose of Definition?", and the older guys would make little comments about waists being a bit too thin, and wondering how they'd do in the Olympic Press. Or they'd comment on pecs looking too feminine, etc..... It was sorting itself out by the 70's, but back in Pearl's prime, there were still some that looked on it with that type of eye.
Also got better for pure bodybuilders with the shift toward Weider controlling it, rather then Hoffman/York Barbell.
