Every RD I've ever used with an 8-speed hub could handle the range, using friction shifting. Including the Campy Nuovo Gran Sport, Nuovo Record, C-Record, Croce d'Aune and Rally (1st gen). As well as all the Shimano, Simplex, SRAM and Suntour ones I've tried. I think almost any Rd made in the last 50 years can be made to work over 8 cogs, using friction shifting. Campy or otherwise. If indexing, well, that is another story.
In my experience, maximum cog size is a much more important limiter than number of cogs.
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● 1971 Grandis SL ● 1972 Lambert Grand Prix frankenbike ● 1972 Raleigh Super Course fixie ● 1973 Nishiki Semi-Pro ● 1979 Motobecane Grand Jubile ●1980 Apollo "Legnano" ● 1984 Peugeot Vagabond ● 1985 Shogun Prairie Breaker ● 1986 Merckx Super Corsa ● 1987 Schwinn Tempo ● 1988 Schwinn Voyageur ● 1989 Bottechia Team ADR replica ● 1990 Cannondale ST600 ● 1993 Technium RT600 ● 1996 Kona Lava Dome ●