I would love to drop in the 3MZ or the new 2GR in my car, but it would just be overkill. 225 HP on a Corolla? Nevermind the horses, just look at the torque figures on that engine. 240 ft-lbs at just 3600 rpm! You definately need an LSD to control that; however, props to that guy for being able to cram that big V6 into his Celica. I love his quote, "It's big, it roars, it eats motor mounts for breakfast". LOL
Personally for Pete CM's Corolla, I would suggest waiting for the new ZR engine family to come out. I'm particularly interested in the 2.0L 3ZR-FAE that's going to come out by 2010. It uses Toyota's new Valve timing system they've dubbed "Valvematic". The engine is going to make 155 HP and 144 ft-lbs (about 160HP and 148 ft-lbs by old SAE standards) and be just as fuel efficient as the current Corolla engine. Put this engine into an 8th gen Corolla and you'll probably return 0-60 times of low 7 seconds while not sacraficing MPG.