Hello, I have a 92 fountain 27 ft no step in hull, I'm installing a new 555 CI, it's suppose to be 750 HP, the existing drive is a bravo 1, I'm looking to up grade the 280 k planes , and the lower drive to a 2 inch shorty IMCO , and possibly get an extension box.....I'm not a boat builder, I was suggested to do all this from some of my boating friends and I'm looking for input from anyone who has ideas on this build

Ayuh,.... Whatever the options you choose to go with, only do 1 at a time, so you can figure out what helped, 'n what was a waste of money,....

Thank you, definitely makes sense.