Hi,
My new 462 with stock log exhaust manifolds does the same thing. Turn the key and the starter barely turns. Eventually it turns over and the engine starts. My initial timing is set at 12* BTDC. The starter was a new rebuilt.
Mike
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1968 Pontiac GTO 462CID, 4-Speed Manual, 3.55 rear. Aleutian Blue exterior, 219 Teal Blue interior. Chrome bumper, AM & 8-Track and Rally II Wheels
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