Again you're ahead of me.....I'm sure I'll need to do all of that too. My plan also includes testing a tuned airbox which might be something that could help with you 5k dip. For your engine, you'd need to separate the banks like the more modern stuff, then the airbox can be build as a Helmholtz resonator tuned to 5k rpm and fill in the dip. Careful on that path, normally what happens is you "fix the dip" by reducing everything above it. Horn height makes a big difference so don't discount that. I have 12 MAP sensors so I can calculate fuel needs of each cylinder individually, do the TB sync and compensate automatically as they drift out of sync and light the "slow down" light when they exceed whatever compensation limit I set but they do not respond fast enough to collect port wave data, you'd need pizo sensors for that....i think. I was just focused on will it run and styed below 3k so I saw the cylinders pull vacuum and drift back to baro pressure each cycle but no waves even logging at 1kHz...I think the ECU reads at 2kHz but 1kHz is the logging limit on my system. Google tells me the LM2 is a 32 channel logger but its got you AFR, so I guess you can add 31 additional sensors. looking quickly I didn't see the logging feq spec but I suspect its nowhere near high enough to log port waves even with the right sensors...10Hz is usually more than plenty for AFR which is what its built for so...... Do you have AFR date for your dyno runs? Everything look ok at 5k or is it wonky? Most gain is within an inch or so of the seat. The stock exhaust flows way too much for the stock intake (Stock headers were apparently intentionally mis-aligned to the exhaust ports to help the flow balance) so improving the intake by 10-15% makes everything better. Your engine is making good power so whatever they did seems right.