We must be looking a the same boat in Islamorada, FL??
Everything I've read, and folks that I've spoken to say it's under powered.
Heck, I have the same F250 on my Adventurer 208! Granted that is more than adequate for the 208, I just think it will be tough to get that 270 on plane if you have 4-6 people on board, and full tank of gas.
Might be ok with just a couple and calm conditions!
Twin 150's, or maybe a new F300/350 would be a better choice!