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Thats due to the intake manifold. Look close & you will see that its a dual plane manifold. This is a 61 only manifold. Very heavy, twice the weight of the 62-63's. The 62-63 manifolds are a single plane. 61= more torque,,62-63= more Hp.
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Keith Collier 61-63 Pontiac Tempest Tech advisor POCI.org |
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