a k20c motor is only a 2.0... not strong enough to pull an accord, and at about $6000, you'd totally be wasting your money. The accord has a K24 in it... 2.4 liter... much more torque. Now, a motor out of a TSX would be fun, as thats a 2.4 as well, but with 200hp, versus 160 in the accord motor. Plus you could add the 6-speed tranny. The H22 motor is not really compatible with the new accords, keep in mind as well that the new honda motors are backwards compared to the older motors. Having the intake on the front of the motor, and exhaust on the rear. It would be way too much money and time to get a H22 to fit the new accord. With the money you'd spend on that, you could have a ton more HP out of the stock K24.