I am suspecting it was made by Fu Hwa as the interior looks identical to our old Fu Hwa 38' double cabin which was also in MI and also had a Perkins.
The hull is pretty solid and Perkins engines are usually bullet proof. Where you will find issues is with soft decks due to screwed in teak decking, leaky windows, and the cursed black iron fuel tanks which will eventually rust and leak but might last another 20 years on the Great Lakes. Other issues include old wiring and unpulled dead end wiring, old electronics, 30+ year old flax in the stuffing box, drafty sliding doors which also let rain come in, and poor water drainage on the flybridge (drains on the AC power inlets...duh).
Sold the boat and our MI our condo about a year and 1/2 ago. We loved it but the trip from FL to MI was getting tiring. We are now wishing we hadn't sold the boat or the condo but if we buy another boat, it will have no teak and will be no older than 15 yrs.