Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - 383 or 406 small block?
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Old 09-03-2009, 07:58 AM
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my87Z my87Z is offline
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i dont really agree with buying an aftermarket block, if all you plan on making is 450-500hp, they are typically used for high cube (421+) and high power output applications, the 383 is likley going to be cheaper and easier to build, simply cause finding a good 2 bolt main 400 block isn't easy, but the 400 will make more power due to the extra cubes

someone made the claim that the 400 would last longer due to the fact that is would make its power lower in the rpm range, this is false, they both have the same 3.75 stroke, there rpm ranges with be next to identical, but at any given rpm the 400 will make more power. "there is no replacement for cubic inch displacement" i agree with tech insp 1, if i were to buy an aftermarket 400 block it would deffinetly be 427cid or larger and my output goals would be much higher
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