Not to be a jerk or anything, but a TBI is easier to fix than a carb switch is to do, just go buy a use TBI and replace it if you can't fix it. Other than that there is only the ecu & wiring, which you will need to deal with any ways.

I have been running TBI & TPI, and they are better than a carb setup, and they don't gas wash your cyl's.

Pat