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    Help! 1966 427/425 Rear End Issue

    Tom, Thank you so much for your valuable insightful information. We appreciate you taking the time to help educate us on this issue. We are so thankful for having a forum of knowledgeable people which is a blessing to us. Rick
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    Help! 1966 427/425 Rear End Issue

    Looking at a 1966 427/425 - The rear end is a not original. The seller is telling us It is a 1966 3.55:1 posi 4speed 327v8 rear end. Stamp reads AN4166. Is this a major concern, being in a Big Block car? We thought the 4.11:1 gearing was preferred for the Big Block, the 3.36:1 ratio was less...
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