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post #2 of (permalink) Old 05-08-2009, 09:44 AM
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It's been done, but is overkill, IMO. Years ago a buddy had a 4-barrel - Holley I think but am not sure - on a Clifford intake on his 258. It had vacuum-operated secondaries and we couldn't confirm that they ever opened more than a little bit.

On the other hand 4-barrels were big on the 283 and even 265 C.I. small-blocks when those engines were the hot setup, but they would spin 6,000 RPM and beyond when properly set up - WAY beyond what a 258 should be asked to do. I doubt that mine has ever been past half that speed.

EVERYTHING's easy for the guy who doesn't have to do it.
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