Factory Cast-Aluminum Intake Manifold Comparison - Intake Uptake Revisited
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This photo reveals just how far the deep plenum's floor deviates from the original design. This characteristic is common to all '72 455 H.O. manifolds and any service replacement R/A-IV or '71 H.O. casting. It appears that all modern cast-aluminum reproductions are also this way. View Related Article
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