Marty P had a set of 455 HO heads that were severely ported, several holes in the ports,
(many years ago) and they leaked at 290 cfm. A very accurate flow bench was used.
I can believe 275.
Tom V.
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"Engineers do stuff for reasons" Tom Vaught
Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward.
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