Got the Plenum spacer re-installed, but my knock retard is still out of whack. Also, my AFR @ 6000+ RPM's is now 13:1 instead of 11.5:1 from before. Going to install V60C1D tune which runs pig rich on my car, see if that helps. Don't know what is going on.
Camaro V6 = 11.268 @ 120.11