427 Ford Cobra Small Block Heads
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In Part 1, I really didn’t get into the motor internals so here we go. The Ford Racing 427 small-block has a 10.5:1 compression ratio engine that uses aluminum 64cc chamber cylinder heads. Ford calls them X heads. Each X head is about 22 pounds, and compared to the stock 351 iron heads, that is 25 pounds lighter. View Related Article
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