the kit that I sell is factory tuned using all chrysler parts. TBI computers are quite different from the later MPFI ones and are pretty well set with the fuel maps that they come with.
You can tune some with timing (up to 14 degrees) and fuel pressure increases (up to 16 PSI) to allow abit more performance; as far as turbo goes I'm unsure of that as I haven't went that route yet, although most of the FWD mopars of the early 90's were TBI (4 cylinder) and some were turbo so its possible but I'm not sure whats Involved
