Smog/Oil leak

Ok, one thing at a time: A common oil leak (and vacuum leak) is at the intake manifold. Nothing special about replacing the gasket but remember, half the job is in the prep work. Clean the threads and bolt holes and lightly lubricate with engine oil prior to assembly. Use the recommended torque spec and sequence. Use silicone sealant in the corners, glue down the front and rear gaskets and get someone to help you lower the manifold into place - it isn't that heavy but is awkward. Next: I strongly advise against removing the AIR injection pump or any of its components. You will gain nothing - at all - in performance. Your engine was designed to run with these components in place and DO NOT effect performance in any way. If you start hacking your emissions system, you'll always wonder why it doesn't run "quite right".