AMT made a twin small block powered 30' cat that ran right around 105mph with twin 390hp SBC. Set up on drivelines. From what i understand they only made one, but also based on the reviews of it, it ran pretty well for that power package. They were from PCM engines, originally the ZR6 package, now they are called the ZR409.
I know that Arnaldo at Predator will build you the same boat, since they have the AMT molds now. That is one of my ideas for a new boat.