Found the leak. Seems there's a port on the passenger side of the intake that is not "open" from the factory. Somehow or 'nother, the tab broke off, and "opened" that port. As a "make-shift" workaround, I took a short piece of rubber hose, slid on that potential vacuum port, and plugged the other end of the hose with a machine screw. Seals the hole for now. Need a permanent solution though.

With that said, I drove the truck to work this morning (50 miles one way), and had ZERO issues. It's back to it's old self again. Even the part about sucking up fuel at WOT!!!



So far, so good. I have some pictures of the new block before I cleaned some "kruud" out of it. Will post later this evening.