Re: ref 29ft Maxum power
that is almost the exact same specs as my 1997 2800 SCR in regards to LoA, Beam and displacement, which also came with a 454. I think that is fairly standard. The HP varied between 300 - 325 on the 454 depending on the year, although I think that 300HP is more accurate, even for those boasting 325 HP.
I've seen a fairly consistant split regarding opinions on this. Some consider this a great power package, many including several mechanics I've spoke with think this is a bit under-powered.
I recently upgraded to a 496 MPI (375 HP) and the difference is amazing. More power, more torque, easier to start and a Max. rpm of 5000+ (the 454 max RPM is between 4200-4600). I can run at the same speed at lower RPM's and have much more room in regards to overhead for more RPM's. SO the engine is theoretically not working as hard.
However, if it's not broke, I wouldn't fix it. You don't have to look hard to find things to throw money at on a boat. I only replaced mine because the motor blew onthe 454. Mostly the result of the previous owner overpropping it and lack of regular maintenance.