Well, I see I'm getting a good education on the differences between the various years and models of MasterCrafts. I didn't know there was that much to learn. Thanks to everyone who has chimed in here with the extra info. I added additional photos. The hull ID is MBCSABT8j485. Perhaps the extra photos and ID will better tell the story of the boat.
I don't pretend to know all the ins and outs of the different years and models. I thought they were all prostars in this vintage. Apparenlty not. What I do know is that I have a very nice, extra clean, incredibly well maintained boat here. It has given our family years of fun and it has a ton of fun yet to give to another family. Hopefully someone else will be able to enjoy it as much as we have; regardless of what the true name of it is!