First of all, what are your plans with the car? Road race, autox, drag? Each motor has its own positives and negatives. If you want a h22, it has more power out of the box but you gotta compensate for the extra added weight by getting better suspension. An h22 weighs about 385 lbs and b series motor weighs roughly around 300 lbs. The h22 I believe is a better motor because it has more power to begin with and it also makes more power after each mod because it has more displacement. And whats al this talk about 700 hp h22's? Be realistic here and don't believe everything you herar from a import magazine. Also remember to upgrade brakes.