In addition to the great folks and info here I would also reccommend checking out:
http://continuouswave.com/
and
http://www.classicmako.com/
two other great sites with lots of similar projects and plenty of expert opinions. Spend hours using that search function - everything you need to know is a click away. Best of Luck!
BTW my cousin also has a 69 seafari project. Transom close is complete, he's at the gelcoat stage.