If you can work on the motor that's great, but do you know how to work with fiberglass? Most boats from that era will have rotten wood, some a great deal of it, and it's not always easy to spot, if the one you pick does have a rotten transom or other things it will mean you probably won't be on the water this year.
Check out the restoration section here and look at the threads, they frequently start something like, "I found a small soft spot in the floor", or " there's a crack on the transom, how do I fix it". This is followed by 10 pages of them doing a total gut and rebuild and hoping to be on the water by next year.