17.5' Lucraft CC: foam and fiberglass sealed stringers?

[alumanaut]

Looking at a 17.5' LuCraft CC trihull. I asked owner if it were foam filled like Boston Whaler, or a fiber-glassed wooden floor with wood stringers. He replied that it is "foam filled with fiberglassed, sealed stringers." LuCraft, built in Daytona Beach, FL, apparently went out of business around 1980. Would a 1980, or earlier, LuCraft have construction like a Whaler, or more like a conventional fiberglass boat?