Fisher; Listen to Threeweight! You need a 10 micron filter........either the Racor or canister will do. Those internal motor filters won't save you. I have the canister style and change it once a year. Mine does fine, but I have good "fuel habits". I'd mount the filter on the inside.......above the fuel tank and against that narrow starboard panel.
Your going to need hoses. West Marine can advise you on that and has it by the foot. Make sure you double clamp the fill hose and "loop" the vent hose in such a way that it doesn't trap water. If your boat didn't come with a factory tank, then you'll (obviously) have to drill some holes. Before drilling, get the parts first. You don't want to go oversize on these. Also, remember, when drilling in fiberglass, start those bits in "reverse". Finally, if you have any questions regarding the accurate location of the fill and vent holes; a call to Arima would probably be your safest bet.
Yat