'68 Yenko, Transplant vs. COPO - The Supercar Registry

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'68 Yenko, Transplant vs. COPO

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#15

04-25-2001, 11:58 PM

Chevy454

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Re: '68 Yenko, Transplant vs. COPO

When did GM start using the double pumper? Was it in '69 only? Weren't there availablity problems when the ZL-1s came out? Wasn't it Charley's ZL-1 that started out with a vacuum secondary because Holley hadn't delivered the 850s yet?

When did Holley start making the double pumper?

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