I have the 8.1L 496's in mine.
Love the boat, except for the Bravo3 drives and the corrosion issues. Keep an eye on yours and make sure you have the correct type of anodes for the type of water you keep it in. This will slow it down, but not stop it.
The one modification that I did to my boat was relocate the head vent filter. The factory mounts it up in the port side gunnel, behind where the cockpit fridge is located. It was almost impossible to reach the one side of the filter to unscrew the hose fitting. I ended up extending the hoses a few feet and mounting it in the engine compartment where it is serviceable.