[lovehamr]

IMHO Anthony nailed it right on the head. You're running a small cam for the displacement that you have now. This is reflected in your dyno sheet, the poor thing is running out of air. I don't have any experience with your heads, and intake volume (190) is only a small part of what makes the head. Do you have any flow figures for the heads? If they are adequate then a cam swap to something with close to .600 lift and 250 duration @ 50 will wake that puppy right up. Basically you need something to measure on the far side of 5250 rpm!

Steve