stick with a b series, h22 are very heavy motors and will require upgrading the suspension with a lot harder spring, the h22 will also sit farther towards the front of the engine bay then a b series, and will throwing the weight distribution off even farther causing a lot of understeer, the only way to fix that however is to srenghten the rigidity of the frame, which honestly isn't worth the time or money to make the car better at going arround corners. I do however agree with stock98ekcoupe the k-series are way to expensive and are not worth the price. the k series motor will also not alow you to lower the car because the motor itself is so large, and you will come across a lot of clearance issues. Its been done before in del sols but the figures I seen for cost are between 8k and 10k for the complete swap, If you have that kind of money lying around then by all means take on the project if you have some experience in swaps.