First, It's a great boat. I had one with a 502. Ran about 60. Very good ride - smooth.
The factory is vcery helpfull and will supply all the original specs of your specific boat along with parts and advice.
Look at the usual, transom, stringers. Floor is less of an issue. May need new fuel tank and plumbing. Fuel pick up is plastic and needs to be replasced with metal but this is a small, easy job. Then all the usual stuff with the outdrive, gamble, bellows etc.