TAB,
I spent my youth near Lake Mead. I know how to build boats for power and speed. Brought that knowledge back here and helped a few ski friends.
It is about torque!
You want a boat to go? 454! 500hp without ruining driveability or longivity, and torque curve climbs right with it. Torque turns those big steep screws, and you dance on the surface while the horses do their job

We used to pull the jets off boats, glass the transom, and put in direct drive shaft and rudders. 454 with a dual quad tunnel and inverted headers. That is what you call a River Rat! Today the guys are adding nitrous for the hole shot, but nothing else has changed.
And by the way, the ad is trying to claim cigar style. That's craigslist: Suckers love it.