The problem you're going to run into is that the pistons are only notched for an 8 valve head. Onless you slap in different pistons, you can't even put a B7 head on it, or a vtec head for that matter. If you do put the other pistons in, you could throw no a b7 head and get a crx si cam, or just throw a z6 head on... Worth it? not really. You'd spend more time and money than if you just slapped a d16z6 in it to begin with...