With the Dizzy you need Z6 internals in a y8 Dizzy shell.
Because the z6 dizzy does not line up with the bolt pattern on the y8.

You can even use OBD1 wiring on the OBD2 motor, they are almost backwards compatible, there are a few sensors your are gonna have to get to just plug em up and let them dangle.

Oh and I got a perfect y8 dizzy if you need one.