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GM Distributor Clamp NOS 283 302 327 350 400 396 427 454. Box is not included as these were purchased in bulk long ago. Fits numerous years of GM cars, both small black and big block. Camaro SS Z28 RS Rally Sport RSSS Chevelle Malibu Super Sport, Corvette Stingray, Chevy II Nova SS Yenko, Belair Impala SS etc.