This is what you want your a/f ratio to look like when you are done dyno tuning. One run is the motor as a 3.2L with "off the shelf" SW chip, Dansk premuffler and Dansk final muffler (similar mods as to what you have) and the second is the motor as a 3.5L twin-plug with more bells & whistles:
Steve will get you there as long as you provide him the data to work with.
Ralph