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#1
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Not that I want to start this but. Not all 4K had that fan and clutch. The other known cars had the 3 inch BC 5 rivet X pattern fan. Jeff
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#2
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Jeff, I believe the mid April to july l78 had the 3.25" clutch, along with the z cars. I've been wrong a few times in my life so I'm not 100 percent on that.
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