So are you doing any porting and polishing? 3-angle valve job? Oversized valves to help it breath better? Or are you just trying to get it more reliable and working better? Because honestly, if you're throwing headers on anyway, you might as well at least port the exhaust side of things to get a little extra out of it.

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Nathan

-2010 4.0L 5-speed 4x4 Black Sport
3" SR Bodylift | T-Bar Crank | 6400 Shackles | 315/75/16 Disco S/T | Hella Rallye 4000 9" | 55W 6000K HID