Didn't want to wait on a smoke tester. I do still plan on purchasing one, but for for now I used a hand transfer pump from hobo freight and a cigar. Found zero leaks in the vacuum system.
I have gone over the car multiple times with it idling. Whistling seems to be coming from 70mm SR Performance TB. Makes sense I guess. Noticed it was hanging open just a bit too. Cleaned it up and got it to close fully. Still have the whistle. But throttle doesn't hang up anymore and I seemed to have gotten my power back.
1/2" smaller belt should be here today, hopefully that will fix my belt shavings issue and put my tensioner back into range.