Old 07-23-2010, 11:33 PM
  #2  
Tod74
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RACING JUNKIE
 
Join Date: Sep 2007
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There has been lots of discussion on SPEEDTALK about it. If you go there and do a search there is lots of info as to the "WHY"

Here is a HOT ROD article with a back to back test of a standard cam vs 4/7 swap.

http://www.hotrod.com/techfaq/113_07...ams/index.html
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