I don't have a picture to show you, but it is a line that comes directly out of the intake. The vacuum tree is not as good because you have vacuum devices (like the power brake booster) that can vary the vacuum signal in the tree more than the intake.
If you use a line from the manifold and get a code - you might have a bad MAP or vacuum line to it.
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Tom (Torque) Moss
88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE).
http://www.fastlanecars.com/
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