First, Welcome to the forum!! Congrats on the new to you boat. Can be the happiest day in a boat owners life. Really exciting time.
AS for the ID of your "new" boat, I am unfamiliar with the "COW" ID. Yes, it looks as thought it was built in '82 and it looks as though it was the 30th in it's line.
However, I don't think Com-Pac was building Suncats at that time. Think late '90's or so. A photo of her would be very helpful.
Looking forward to figuring this one out. Welcome again.