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I wouldn't go leaning it out too much until you get your wideband hooked up. Narrowband sensors are only good at detecting 14.7:1 AFR's. Anything above or below that and it's useless. .98 could be 9:1 while .96 could be 12:1.
Looks like you're seeing some knock by the looks of your timing in the 4500rpm area.
About your lo map needing to be so high. Look at your maf and see if it's been hacked by anyone in the past. The more air that's bypassed around the sensor the leaner it will run and therefore you'll have to richen it up. This has more of an impact at idle. If it was hacked it was probably the previous owner's way of leaning out the tune before they bought the SAFC.
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Kletke - 16g @ 27psi on Meth
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