Turbo City (http://www.turbocity.com) has a nice fuel injection kit for older vehicles that uses GM computers, sensors, and throttle bodies.

Holley also makes the Pro-Jection, but I've heard mixed things about it.

The best thing to do might be to swap in a late model 302. Pick up the computer, harness, and all the other little things you need out of a wrecked car or truck. You can also get the harness from Ford Motorsport and a few aftermarket companies as well.