First, please do not continue to post in the forum until you see an answer. Ok?
Second, the GTP38 is a reverse rotation turbocharger, specifically designed for International. It can be found on the DT444e and the DT466 (select models).
There are several versions of this turbo, but for the most part it flows roughly 58 lbs / min.
Its a fairly large turbo charger, with a custom turbine wheel (larger than a P trim) and around a 65mm compressor wheel.
The turbine housings are around .89-1.15.
Could you make horse power from this? Yes. Be warned: these turbos are reverse rotation compared to a traditional style Garrett.
Also, the GTP38 is journal bearing.
The larger, custom Garrett GTP38-R is ball bearing, and flows almost 75 lbs / min.