I replaced the Energy Suspension red poly trans mount with a new stocker, and that seemed to fix the vibration.

I was hyper sensitive to vibrations when I took for a test drive and had it up to where it pulse-vibrated most noticeably (around 2200 RPM in 3rd) and it no longer does that. I think I am still feeling small "normal" vibrations of having a torque strap, but the pulsing vibration is gone.