Old 01-29-2012, 08:35 AM
  #10  
roadkill2
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RACING JUNKIE
 
Join Date: Jan 2012
Posts: 628
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Originally Posted by SPEEDNEEDS1
I have ran the 454-R many times on several different engines and rthey all ran well, but the Merlin X is a new design and the same brand as the heads so I thought that the Merlin would better than the 454-R.
Stay with a matched set . . Heads and intake . . best place to start, anyway . .
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