Aftermarket parts for a 2.3?
 

Is there a company out there that has parts for the 2.3 mustang? I have no trouble finding parts for a 5.0. Is no one in the 4 cylinder business?

Try a search for Jack Rousch. A few years ago, they had ALL the 4cyl bases covered! I read an article on a turbo 2.3 T-Bird where they put in a little bigger Crane Cam, 4.11 gears, and punched a few small holes in the rubber waste gate hose to fool it into a little higher boost and the thing was insanely quick esp. for a fairly heavy car w/small cubes. You really need a boost gauge and a detonation-control ignition here, though! I think I've still got the article in my "library" if you'd like to see it (scan and send).

More "musings" - friend of mine used to have one in a pinto and it would whip any 283 out there! All you need is headers, a little bigger cam, clean up the ports, and a little bigger carb (i.e. 450 4bbl or big 2bbl) on a manifold. Gears (i.e. 4.11's if you have a 5 speed od) also help the rpm's build more quickly. A heavy flywheel helps you off the line and between shifts, but an alum. flywheel lets the engine rev lots quicker. The basic engine is real stout and has lots of potential. Enjoy!