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I have a 67 Custom 500 with a small block (302) cranking about 290 HP and a rebuilt C4 trans. I replaced both the engine and the transmission years ago with healthy rebuilds. The stock (8" I think) rear end is bone stock with 2.80/1 gear ratio. Im considering converting the rear brakes to disc brakes and changing the gear ratio to 3.55/1 to give some added torque on the bottom end acceleration. With the rear end ratios I have now I have poor acceleration from a stop, and quite frankly, i'm tired of not being able to bake the tires! I've only had the car for the past 21 years....its time to get things dialed in to have the maximum amount of fun possible! I'd sure appreciate your feedback!
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The 8" is a strong rear end. Most ratings I have seen on them is 400 foot pounds of torque. That 302 should not blow up the rear end. Most of the stories I have heard of 8" rear ends letting go involved grippy rear tires and dumping the clutch. It may be harder to find an assembled 8" in the ratio you want than a 9" but of course to do a 9" you also need to replace the housing. If you are rebuilding what you already have the aftermarket has you covered. What rear discs are you thinking of going with??
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