LS1 cam 90mm throttle idle issues :(

[kjlindgr]

I'm having some lingering issues that I'm yanking my hair out over. I'm hoping you guys can shed some light on things to try for me. I've read and implemented all the idle tuning procedures listed on here. I've spent hours reading. I've spent even more time playing with changes to see their impact on idle as well. Here are specifics around the vehicle:

* 2003 Corvette ZO6
* stock bottom end
* mild camshaft
* AFR heads
* Fast 92 intake manifold
* LS2 90mm throttle body


Here are symptoms of the issue I'm struggling with:
* car idles perfectly fine
* when coming to a stop, periodically drops past idle and dies
* no real correlation to stalling based on previous RPM...but somewhere around 2500-3200...normal driving


I'll attach my tune below, but this is just driving me crazy. Any further suggestions to try? I've tried just about everything based on the many idle threads on here. Anything glaring that I'm just overlooking because I've been staring at it so long?

Thanks guys!