Honestly I think you should start by building a strong 502,heavy boats like torque, run that for a season or two and when you get used to it you can add the charger. All you need is a 502 shortblock, use your heads and accesories.

You can pick up a brand new 500hp/502 shortblock for under $5k directly from GM,spend a grand rebuilding your heads with new valves and springs
and adjustable valvetrain add another grand for custom tuning and youll have a strong reliable engine for under $7k and an engine you can throw some boost at later.
http://paceperformance.com/i-6255353...-assembly.html

24 outlaw baja
 

My dad has a 24 outlaw baja with a 454 mag efi 22 pitch prob and we gps it at 64 all day with with 2 people half tank of gas 5100 rpms . So you def. have some issues. My cousin has a 2006 23 outlaw reg. 496 and runs 64-65 on gps every week-end with a 23 pitch prop. These are real numbers no BS here. Hope this will help you out bro..Good luck ..Blown525

With 1.5 gears, 4200rpm, 52mph = 15% slip
With 1.36 gears, 4200rpm, 52mph = 23% slip

STEP 1 - Try a Mirage Plus 21 with 2-3 people on board and get solid data.

building 383's for 2001 29ft scarab, had 5.7's ,,,, anyone have strong suggestions,,,, reading ,, forged crank, internal balanced,,, hyper or forged piston staying around 9-9.5 comp ,,,, 5.7 forged rods ,,, vortec block, vortec heads 194 intake, 160 exhaust, match port ,,,, mpi , reprogram computor. ,,,, cam not sure, not much info, 210-212 dur.@50, 495-500 lift, 110deg. centerline lobes
Welcome ALL thoughts

sorry pushed wrong button

I don't know a lot about Outlaws but I know the 25 is a MUCH bigger boat than a 24, so not really a fair comparison. Not sure on the newer 23.

What diameter??

The only difference between a 24 and 25 is that a 25 is one foot longer and has a small pad on the last couple of feet. The weights are nearly identical and the 25 is 1-2mph faster than a 24 with equal power. The 25 has a different cabin entry, so they seem bigger.

The boat should run 61-64mph with a 454mag, 1.5 ratio drive and 23 Mirage Plus prop.

If thats a stock motor with cast iron internals you are playing with fire to add a pro charger. Ive heard stories of guys getting 20 hours of good hp and them boom! No more motor. Forged internals are need to add any kind of supercharger.
You are much better off just building another motor over the winter and then dropping it in come springtime. You will get the speed and can recoup some of your money by selling your current motor.

PS--I think your doing pretty good to be hitting 58 mph with a 295 hp motor (at the prop) and a full boat of people and fuel.