What do you want to know about it? Mon Ark was built in Monticello, Arkansas as I recall aka namesake. It was built during the early bass boat revolution and looked as many of the time with a few twists of the designer's pencil. Ranger, Kingfisher, Quacita, Chrysler, Glass Magic, and Skeeter were some of the common names down here along with that brand.
Problems are primarily water entry driven. The water marks I see "smells" of having been left out in the elements for a period of time and that can't help things. Decks, transoms and stringer rotting is your main concern along with water logged flotation under the floor unless it is like the Chrysler which had an air chamber under the floor (deck) with no flotation material. Deck rotting was your main concern there. 15-16' were the common lengths. Engine hp ran from 60 to 85 usually. With a 65 one can expect 35-40 with proper "setup" and prop tuning....36 with friend's 65 Johnny on a Kingfisher. Hard riding. Beat you to death in a good chop. Sponsons of the era don't help; actually hinder smooth, dry ride, and in a quarter, where the wind is blowing from the beam (side) and you are quartering (45 degrees to) the waves, makes for a wet, bumpy ride.
Got 2 choices as I see it. Check it out and if it seems solid leave it be and use it as is. If it seems too heavy (wet flotation) or bottom has a bow, hull wiggles in a good chop, or transom flexes when you firewall it then you might choose to dedicate lots of time and tons of money in a restoration.
I see you have console steering. That's a plus as some of these boats had stick steering from the front seat and that was a very unsafe design.
The above comments are my personal opinion based on facts that I have observed being a participant in the sport.
