Why not use Arnold or Zane? Serge could use more balance between upper and lower body. Glaringly apparent. But then, he was a Mr. Olympus, WBBG, that is.
Arnold, balanced? WTF? Serge's lower body was not on par with his upper body, sure. But Arnold comes to mind when one says unbalanced: chicken legs (with good separation), chest and biceps overpowering the rest by far. Zane, I agree. Strange abs on Serge but his upper body is fantastic, shape and muscular quality (quite dense for that period) and his legs were a bit better circa '75.