What are "990" heads??? - The Supercar Registry

04-05-2007, 06:38 PM

JHS

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Location: Rome, Georgia

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What are "990" heads???

I have a BB with 990 square port, open chamber heads. I have not pulled the valve cover to get the complete part# but none of my books make reference to any BB heads ending in 990. Are these over the counter replacements and for what applications? I was told my 427 BB had these heads with L88 pistons. Thanks.

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