Originally Posted by glc
Follow the outlet of the air injection pump and see where it goes. Air in manifold will have fittings in the exhaust manifolds.
I'll look up in the Chilton's book where the air injection pump is. Regarding the exhaust manifolds though, I see a tube coming out the rear of the driver's manifold and the front of the passenger's manifold (or vice versa, been a couple days since I looked at it) I wasn't sure if these are perhaps for EGR. If it isn't EGR then I have my answer.