I just purchased this Tour Jeep postcard off of eBay that shows an FC-170 tour jeep in the Virgin Islands in 1968. I searched for additional information on FC jeeps in the Virgin Islands, without success.
Back in 1987 (like 10 lifetimes ago!) I toured St. Thomas in a tiny Suzuki Samarai and in the back of a taxi. The FC would have been a much cooler way to see the island.