use the z6 head, dizzy, IM, harness and ecu on the y7 block.
the y8 stuff is too much of a hassle:
-you'll have to add wires for the vtec oil pressure switch and solenoid, as well as redo the wiring for the IACV (3wire on the y7 harness, 2 wire on the y8 IM)
- you're going to get a CEL for...