Here is some info I found on Uniflite Blisters. I had looked at one before buying CCC. I think Blister problem was from 1975-79 only.
http://www.unifliteworld.com/
"The Famous (infamous) Blister Problem" The issue regarding the fire-retardant resins causing blisters in later years (1975+) was a result of a change in suppliers of the fire retardant resin (Hetron). Earlier models (prior to 1975) contained a fire retardant called "Hetron" manufactured by Dupont Chemical and these boats did not have any blistering problems. When Dupont ceased production of Hetron 1975, a different fire retardant was used from a different manufacturer. Unfortunately, the new fire retardant contained a solid form of the chemical bromine which, unfortunately, evolved into a gas when the fiberglass was warmed sufficiently. This happened to Uniflites in warmer climates like Florida and California more then it did in the Pacific Northwest. This bromine gas created an acid that ate its way out of the gel coat. For this reason, if you were to grind out a deep blister you would notice a "gooey" material. The only way to remove a blister properly is to grind it out, let it dry, then fill the hole with a vinylester resin ($$). It doesn't solve the problem entirely but should provide a strong barrier (plug) to prevent the blister from reaching the surface again. In reality, the blisters will likely return.
In 1977, Uniflite acquired boat molds from Pacemaker Boat Co. on the East Coast and started a second Uniflite plant in Swansboro, North Carolina.
In 1980, a fire almost totally destroyed the Uniflite plant in Bellingham. However, since they had molds in Swansboro they were able to continue production of their boats.
In 1984, Uniflite was acquired by Chris Craft for $10 per share. Chris Craft built many of the same boats under the Chris Craft label. Unfortunately, Chris Craft stopped production in 1989.
