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Old December 16th, 2004, 07:13 PM   #1 (permalink)
<duffman>
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are the exhaust ports on a stock big blocks 455 olds the same as a small block, that is that the center ports are close togther?
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Old December 16th, 2004, 10:07 PM   #2 (permalink)
jdorour
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The port configuration is the same. The bolt pattern is the same also. However, the ports are larger on the big block engine.
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