pay the extra money and do a cr/vtec with the b20 if you have the b20b that is. i have the b20 in my integra stock motor and it is pretty quick. of course my integra has no interior in it at all. i am going to put a gsr head on it and drop it into my crx. why would you add an ls head how much power that add? cant be much just go with the gsr head and build it right and you will have a quick ass car man