No argument about Roger Walker. He was huge in that show!
However, I still don't think Zane or Dickerson should've necessarily placed ahead of Mike. Frank looked drawn, thin and flat, and Chris was shredded but had pathetic biceps, droopy pecs and was just *small*. Mike takes them in the front biceps and side poses without question, IMO. Front lat, I'm unsure -- probably Frank, then Mike, then Chris. Ab/thigh, I'd favor Mentzer again: better abs than Chris, and better legs than Frank.
Chris and Frank ought to take the rear biceps, though. The asymmetry in Mentzer's upper back/lower-trap region was always a weakness. And yes, his rear lat wasn't good (seems like they all lacked in that pose), but I don't know if the other two were any better.
But again, by no metric I can imagine Mentzer beating Arnold. That's every whiny HITer revisionists' history of the event. And some other guys probably deserved to whip Mike in that show. I just don't see that a smaller than usual Zane and ripped but highly flawed Chris were among them, that's all.