I need to correct myself. Two sets of the 80s or a 80s and MB-8s will not fit the standard mounting locations on the illusion. You can run two sets of pro60s or 60s with MB-8s mounted to the top location. The alternative to this is mounting the MB-8s in the standard location and the pro80s on the cross bar with the optional swivel mount.
Here are some pictures taken off this site and malibu crew:
4 Pro 60s ^^^^^^^
4 Pro 80s or 80s and MB8s^^^^^^^^
You can fit the Bullet 770s to the factory location ^^^^^^^^