I'm trying to figure out whats a good vacum source to install it too on my VQDE. The instructions say to Tee it off of the Fuel pressure regulator. Its doesn't seem to be a vacum line just a fuel line. Can I connect it to the waste gate vacum line for a boost source? If anyone has a fix let know pls.

 

Every boost reference I've EVER seen on a G or Z was adding a tee to the brake booster line because it's really accessible to just cut the rubber line and add a tee. Just be aware that in the hose right before the brake booster there is an inline check valve, you can squeeze the hose with your hand and feel it. Be on the ENGINE side of that check valve.