The car im building now will be h2b and should put down around 280 with a very simple h22 build you just have to make sure its built right . It should still get close to 30mpg and have good drivability (im not using stage three cams) . Realy man just read some on honda tech its not that hard or exspensive to build a dependable all motor h22 . If your planning on building any other all motor i cant help you . kseries is bad ass but your gonna pay and b series is just to small of a displacement to make big all motor hp without reving this piss out of them which means there not going to last long hitting 9500rpms . Its just realy hard on a engine which is why the k series is such a great motor they have been proven to rev high and stay together there just realy pricey.