TBI was/is a hybrid of a carburetor and a fuel injection system- - - - -and it's not really a good one. That's true for both OEM and aftermarket systems. I was teaching auto mechanics at a Tennessee state trade school when the first ones from GM showed up on new cars, and lots of us instructors attended the same factory schools as the dealer mechanics did, so we could give our students entry level training on the systems and make them better candidates for employment with the dealerships. The downside to any fuel injection system is controlling the volume and frequency of the pulse to deliver the right fuel/air mixture over a wide range of operating conditions. Air temperature, coolant temp, engine RPM, throttle position, manifold vacuum, transmission gear selection, and a bunch of other variables have to be factored in before the injector can provide the right squirt under all conditions. Making all that work on an engine the TBI unit was not engineered to fit will increase the likelihood of getting less than great performance by a pretty big margin. Good luck- - - -you'll probably need it!
Jerry
