I owned and livedaboard a Uniflite 42 ACMY with Cummins 555s. Was early in my boating experience so I can't comment except I liked the boat, was a decent liveaboard. It was a 1975, just before the blister issue arose.
The Uniflite blister story is a long one, but suffice to say it put them out of business at a time when they were one of the largest recreational builders of motoryachts in the world. To be sure, their blister problem was severe in that the entire boat blistered, even above the waterline. I bumped into a guy up in the Delta who had a 30-ish foot Salty Dog sport fisher. He loved it and got a deal on it because it looked like an inverted golf ball. Truly a sight to behold - akin to hail damage on a car. According to him, the fish couldn't tell the difference.
There are still some bona-fide Uniflite experts floating around. Their inventory was purchased so there is still NOS parts up in the PNW.
Bottom line is I cannot speak to CC quality, but the severe blister issues were likely solved long before they purchased the molds in the early 1980s.
I hired a captain to help me bring it up the coast to San Francisco from Newport Beach. Boat did fine at 8 kts, though no following seas. Captain was incompetent. Spent most of the trip curled up seasick. So much for hiring a friend of a friend who was a sailing instructor....
Peter