Finally got all the vacuum leaks sealed and took it for a spin. Definitely makes a difference. It pulls all the way up past 7000rpms without a noticable fall off in torque. I may need to try to overclock some more to get the redline a bit higher now.
It's now just smooth power from 4000-7000 and even up to the rev limit it doesn't sound like it is struggling anymore. I haven't tuned it yet but AFRs are about 13-13.6:1 up top. It was tuned with the previous manifold to be 12.5-13:1 so there is definitely more air getting in.
There are still a few things to finish up. Currently the throttle cable adjustment is keeping my idle speed up so it won't stall as I am missing a idle adjustment screw, the A/C idle up valve is pulling unfiltered air from atmosphere, the intake is just hanging there and I need to rerun all the PCV lines so they don't look like spaghetti.
Overall I am very pleased but man it was a lot of work. If I had to do it again I would change a couple of things and planned it out a little more thoroughly.
Here's some pics installed:
