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What Are Chevy Double Hump Heads? (And How To Identify Them)and performance-oriented double hump cast-iron cylinder heads with fresh valve jobs. Other Chevy cylinder head castings would do in a pinch, but the double hump, sometimes called camel hump ...
The venerable Chevy 454 would even see a return 20 ... The 454HO crate engine adds rectangular port cast-iron cylinder heads with 118cc combustion chambers to deliver an 8.75:1 compression ratio.
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