i am running waaayyyy too rich.

symptoms:
fouling up plugs without blow-by or burning oil
poor gas milage
not throwing a code

solutions previously attempted:
cleaned air filter (using a spectre cone filter)
changed plugs and prayed
changed fuel filter
used injector cleaner
changed 02 sensors
cleaned maf, throttle body, and intake manifold

mods:
glasspack muffler as replacement for oem
high flow intake

possible solutions:
increase gap of spark plug (due to carefull research i have found that you can safely open your plug gap to .063 [that is with a high performance coil] i am thinking about jumping up from .044 to .048 or .050)
or any suggestions as i would like to try something that has next to zero chance of backfiring on me

ideas?

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2000;3.0 vulcan;flowtech raptor muffler; no cats;k&n oil filter;goodyear wrangler tires;spectre cold air intake;200 watt pioneer headunit with 2 kenwood jl-80 boxes holding 2 10 inch pyle subs, 2 kenwood 4x6 2ways and 2 polkaudio 4x6 plates and two xplod 3 ways in the doors;plenty of scratches dings and dents, chipped (flashpaq)