Welcome aboard! You might want to check out 65 Bowrider's website at
http://www.moeslyseacraft.com/ to learn more about why the designs are so highly regarded by racers and professional boat builders. "The Amazing Mr. Moesly" article in the Literature section is definitely worth reading!
Very few negatives on a SeaCraft hull; most negative things you'll find were created by the previous owners, who didn't know how to properly mount hardware on cored decks & transoms, leading to rotted decks and transoms. And you'll find an occasional dumb modification, like structural bulkheads cut away to install bigger gas tanks and foamed-in gas tanks! Probably the most common mistake I've seen on the smaller models like the 18 - 20 footers is that folks don't realize how efficient the variable deadrise hull is, and that it was designed for motors of less than 300 lbs, so they install a 500 lb motor and maybe a bracket without doing anything to correct the resulting CG shift, and then they wonder why it won't plane at 12 mph like the original Moesly designs did!