FAST 90 intake wont bolt down...
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I don't know why it wasn't fitting right but I just took my hammer and a rag to soften the blow. Next I tapped the tube enough to bend it down maybe 1/2" - 3/4" and it fit fine. It wasn't enough of a change in shape to affect the flow of coolant through the tube. Maybe not all of the LS6 coolant pipes were built quite right? The Best V8 Stories One Small Block at Time
The tiny vacuum line in the back should have a T in it. One side goes to the AIR system solenoid, other side goes to the HVAC controlls. You'll see one vacuum line running into the wireloom by the PCM, this is the one you should still have connected. There IS a barb fitting on the manifold for it.
You should be able to just remove the T, and hook the HVAC end to the fitting, if not, just plug the side that once went to the AIR.



