I would think that the Ravager side gun harnesses tilted at an angle, two Dissies to either side, and the gun in the center replaced some sort of a targeting device? I think that it could be done very easily and would look cool as hell. Post pics of what ever you do step-by-step so that we can steal it
[Edit]
Found this when looking for images of something else. It's from a project log on BOLS

Looks a bit like what I was envisioning. Weird, the guy's blog also had a coven Venom conversion that looked just like my coven Raider conversion! (Can't complain; it appears that he post his a few weeks before I posted mine

)