A Newell casting outfit smaller than a 500 series probably wouldn't last vey long. Those are very stout rods, and the spinning reels are capable of over 30lbs of drag (Shimano rates the Stella SW's at 55lbs). You are talking about 150-300+ lb or more fish
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I have a Newell 546 with a 4.6:1 retrieve ... I call it my 'bluefin' reel. That's kinda what I had in mind, matched with a x-heavy action jig rod. On the other hand, I've had plenty of hour-plus long fights with 60-80# YFT on a Penn 500 with 25# line because I felt in the mood for a light-tackle spankin. Those are the days that other people think I'm nuts.
Those guys were having fun - ultimately that's what matters.