they are also used (i'm pretty sure) on all '83 E15 MPG models (i had one, still have the head, but it needs repair...)
as far as toibo heeds (11041-17M03), I gots several of em, new and used... you got a reasonable offer?
they are without valvetrain, unless you request otherwise. PM me....
or... buy one from dees guys...
http://www.nismoparts.com/catalog/?section=337
(mine are cheeper...)