I have been slowly rebuilding my 9 for the past year. I have the head on and while assembling the mess of vac lines and wires around the intake manifold, I noticed that I have two plugs and two vac lines that have no where to go.

After some searching I figured they go to the Evac solenoid. The problem is, I don't remember if I removed it during install (I am pretty sure I didn't) or if the previous owner removed it. The plugs seem very clean and that's why I doubt myself.

So with the solenoid removed, will those vac lines be a boost leak?
Also, in the picture, what does the second grey plug go to? I am also missing that.

 

No they won't but you have to make sure the nipples on the top of IM are caped.the grey plug is your knock sensor .try to feel with your hand bellow the intake mani bracket on the block.wire from knock sensor goes to that gray plug you mentioned.