SBC 383/400HP - sweet!
 

Stumbled on this - says bravo only but I bet they could do an inboard version.

<iframe width="640" height="480" src="//www.youtube.com/embed/bbCVXPoIeCA" frameborder="0" allowfullscreen></iframe>

Not really anything special. Indmar's 383 Hammerhead is basically the same motor; Malibu used it from 2005 - 2009.

http://www.boattest.com/engine-revie...d-383---400-hp

Yeah my buddies Malibu with the 383 sounded just like that.