I have the same hull operating with a passenger license here in Ireland.I repowered last year with a single F150
Mine has an underdeck tank but I have never used it as I bought the boat with SS tanks under the jockeys. My next project will be to lift the deck and look at replacing the tank but for now the on deck tanks are fine.
The hulls are great in a seaway and carry weight well (obviously I am talking about passengers as opposed to anything illegal
We have seating for 8 on jockeys plus a bench in front of the console.
if you have any questions please feel free to get in touch