i believe this is a picture of a vacuum fitting that is located on passenger side of firewall. the fitting has five outlets, one attaches to the upper manifold, where do the other four attach? because he blocked them off with screws.click here
one runs over the the firewall on teh drivers side to the vacumn tree. one runs to the valves coming off of the smog pump. I can't think right now where the others run but i can go down and look at mine and then I will post again and tell you.
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