The Ford 351 is easy to work on, on the rare occassion you will need to. I can understand why you'd be very familiar with a Chevy 350, because you were probably working on it all the time.
While I have never been in or boarded behind a Maristar, there is generally a reason why an entire line of boats is significantly cheaper than other boats from that same manufacturer or competitors. The reason for the Maristar is, real or imagined, the perception that it cannot throw a great wake. This is why it (a v-drive) is cheaper than the Nautique direct drive, and why, if you buy it, you will have to sell it for less than similar year Nautique D-drives (or Mastercraft, Malibu, Supra, etc. D-drives that have good wakeboard wakes).