These are supposed to be a quality piece.
http://www.infernofab.com/exhaust.html

Cam regrinds are available here:
http://deltacam.com/camshaftgrinding.php

Perhaps an intake. I believe Cosmos Racing still sells one.

If you have the 3.90 gear ratio, I've been told that the 4.11 will be a noticeable gain.

Or you can boost the 2.2 to about 5 pounds without hurting it.