Welcome and nice boat! Looks a like my folks Kona, what's the deal with the 403 Olds? Are you sure it's not a 455?
Awful clean and shiney compared to most of ours!

Congratulations!
Old as the boat is, obviously a replacement engine if a 403 is in there. And nothing wrong with that, it's not giving anything up to a 455, other than it's a much newer "smog" engine from a passenger car. Should still be able to have a ball in it!
That is, until you catch the bug and full blown disease we all seem to suffer from trying to chase triple digit speed numbers, etc after some time in it..............
Ray