P75 Ecu would work fine, but youll need it socketed and chipped cause they run lean on a B20. Trust me, i slacked and didnt get it tuned for a few months. I was running 32psi fuel pressure on a freshly swapped B20 P8R (if your going to ask what a P8R is, google it) Anyways, im not saying i shoulda swapped, but after, i was thinking i coulda put that 3500.00 in a nice turbo on the single slammer. Now, Im saving for my B20 to be boosted.
Im going for a smaller turbo, as stated before, the B20 cant rev past 7 (rocker arms always loosen up) and the smaller turbo will make it a fun car to drive.
As mine sits now with bolt ons, Im at 150 WHP / 147 ft/lbs tq. So i figure my 60 trim AR.48 Internal wasted @ 8 would be perfect to get close to 240.
But like i said, when u do the swap, theres other factors. Flywheel/clutch would be a good time to upgrade these while the engine is out. Not to mention the little BS things that go wrong or something happens. it adds up quick.
Good luck with whatever route you choose. take pics of the build and post that sheot!