dont know about aftermarket but chevelle part number is 3901098 basically interchages with intermediates of chevy, and BOP '67 -'72. Its more complicated than that but if you get a parts interchange manual you can find what you need . If you can find a manual for a pontiac you can buy one for a chevy and use it as it will list pontiacs, etc. also.
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1967 Firebird 400 conv, 1989 Formula 350
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