For a boat application do to the elements exposer I would go with the Base kit with Dual nozzles M14 and M5. Our 2.5 gallon or 6 gallon tank would also be a good choice for you as well.
Most of our V8 costomers pick up on average 30hp to the wheels without even turning up the boost. For you I guess to the prop LOL. You will get max timing all the time, i'm not sure how much more you can get out of the motor 32* is a crap ton.
You will definetly gain some mph, It's not the first boat running our kit. You can just order everything from the store.
www.alcohol-injection.com and goto the kit section.