Thread: 428 SD
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  #17  
Old 10-16-2012, 01:13 PM
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BigAquaBonney BigAquaBonney is offline
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Join Date: Sep 2007
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The 428, and 326 , and 400 was derived from the 421, and 389. It doesn't make it a SD.

There were no mulitple carbs.

It's probably an HO that someone threw a different intake on.

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