UPDATE: I moved the external regulator closer to the TBs, the lean spike before the rich spike must have been a split second pressure drop between the throttle bodies and the regulator. I got the 1>2 shift sorted out, and I think the 2>3. The trans needs a shift kit/plate mod and the PCM needs the shift param's tweeked. I am going to take the injectors out and have them cleaned and flowed so I know for sure. AE still needs some work, but WOT is much better @ 12.5-13.2 AFR.