Jim,
The pump in that car was replaced at the time of the engine rebuild... Not worth touching it. The injectors flow to spec. and are not worth putting any money into. The warm-up regulator is also good to go...
I'm no tii expert but, I would recommend against upgrading to a hotter cam as I like the smoothness of the stock tii. I guess that is why my Metric Mechanic stroker ended up in the basement for all of these years...
If you want a real bang for the buck upgrade for you car look into dropping the 002 distributor and going to a crank fired ignition. It is the best upgrade I have ever done to my car. I'm running a MegaJolt if you would like to read up on it...
If you are intent on getting more power (hotter cam, M3 crank etc..), call Wes Ingram and talk over the mods needed with him. He will steer you in the right direction...http://www.wesingram.com/
Take care,
KC