Why not try one of the new Borg Warner EFR turbo's?
Is the Garrett Powermax upgrade big enough? Looks stock. VGT. Bigger comp wheel overall, bigger TW exducer, vanes altered for more flow. And low cost. Ask Innovative, or Brown's, or Jefferson State about it.
Yeah. Looks stock so your buddy won't know what you have. It's popular in, uh, certain states right now.190s will get hot and smokey with a Powermax, but everyone seems to like that setup. Also, you cannot beat the price of a Powermax.