old style stelling might not clear the accessories on eth front of the engine. I had to get a marine machine power steering pump bracket which mounts on eth the other sid eof teh engien from a merc bracket. And i had to cut down the alt/ps bracker to clea. Its now just an alternator bracket
the tailpipes are the big kicker. Hopefully you the boat has standard cutouts for the tips. CHeck out custommarine.com and they have the dimensions listed so you cans see if any of thier "off the shelf" stuff will fit.