What kind of speed should you expect out of a 25 Rage Mid Cabin w/ a 496MAGHO spinning a 24P Bravo?

Low 70's

I know of a Rage on Lake Travis with a 375 HP and he see`s 68 on his GPS.....

I would think you could spin a 26 fairly easy. We turn near 5000 rpm at 5000 feet elevation with a lab 24 on my friends Rage. This produces 68.5 mph GPS.
We lose 450-500 rpm here at our 5000 feet elevation.
Dave

What is the rev limiter set at in a 496MAGHO?

we have sold several and have seen variations on the limiter from 4850 to 5200....it depends somewhat on what generation the motor is and probably ifnit was a Friday afternoon build .....LOL

5150 on the MagHO and 4950 on the Mag.
These are controlled via the ECM and any variations would be a result of tach error.
Good idea to check your tach with a Merc scan tool. You can't change it but you'll know where your at
Dave

5150 on my HO,
never heard of any of them being different.