Correct. Albrex put it in that same position. Koenig's kit appears very, very similar... just with a slightly different airbox. Interestingly, both were developed for the 119.96x with KE mechanical injection, so both have that weird divot at the center/rear of the airbox, for the .96x's mechanical injection manifold.

Replacing the LH injection with aftermarket is definitely a better option, but the amount of R&D time (and cost) involved with tuning such a system is enormous. For an engine with under 500hp, my unprofessional opinion is that it's not worth the cost... I'd rather leave the LH setup intact, pop in the appropriate EPROM chip, and be done with it. I doubt a full aftermarket ECM would extract much more than an additional 10% compared to LH, and if so, it's probably not worth the cost.

Now, beyond 600hp, I doubt the LH system has enough scalability to handle the power, so installing a full aftermarket system is probably the only way to do it at all. I believe you'll lose at least ASR with this method, and possibly ABS as well. On a street car, I'd want to retain both.