by the way there are zc's that are sohc 88-91 civix/crx si d16a6 is zc...so there for you can make it v-tec with a mini-me head swap, theres different set-up for the zc's which when done right in a light chasis,(crx,88-91 civic) can beat up on some b16's(mostly bolt-ons of course) , plus the chances of you getting a heathly b16 is slim these days which leads to alot of slow and ragged out ones around here and everywhere, a b16 is a b16 at the end of the day and in my opinion has more ptoenial at the end as so does the d16's or any (zc) for that matter but there both great motors...atleast when there done the correct way..