First off a 2j in a corolla is just stupid. Turn a awsome handling car into a chevelle. Yea. Good idea. Second off your comparing a 1.8 to a 1.6. Your not gonna make 400 hp out of a 1.8 and not be close wih the same mod list on the 1.6. And the 4a is alread in and ready. So thats less wasted money tring to make the 2zz rwd. And the 2zz has the better head, but the 4a has the better bottom end. You obbiously dont know what ur talking about when u tring to say the 4a isnt a good motor.