Jim,
The 04 to 08 dyno curves are similar, although are a little bit lower than the '09. I'll try to see if I can dig up some of the older plots we did on the 2004 and 2006 trucks for comparison.
  
Take care.
__________________
Bill Cohron - The Mad Doctor  
Power Hungry Performance - The ORIGINAL in Ford performance tuning... Since 1997!
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