actually, your wrong. As a general rule of thumb, you can't take a b-series head & just plop it on a d-series block. But, there have been some cases of dual over head cam heads placed on a d-series block & it works. You just have to have the right configuration. I've actually seen pictures of this before.

from what i remember, it was a zc head on a d-series block. Eric would remember more about it than i would because he was looking into doin it at one point.