Blewett is reentering the hunt because he's always wanted to go to the South Pacific. Canadian Club invited him to the launch event of this new promotion. It was there, he said, that he decided once again to search for a case of whiskey.
"If I don't win it, it's OK. Getting to Tonga is a win for me," he said.
But if he does, the 12 bottles will be shared with all his friends who are voting for him.
"And then the wife has plans for all the money," Blewett said.
Back in 1978, Blewett and his friend Tim Jackson joined the search just for the excitement.
"It was a lot of fun wondering around the city following the clues," he said. "It took us to a lot of places in the city that we hadn't been to."
Clues included, "board a train that some think was named after the smoothest whisky in 87 lands." The answer: the former "CC" subway line. Treasure hunters were instructed to get off at a station "near Adam Van Den Berg's cow pasture."
"We basically spent a whole day in the library looking at the old maps," Blewett said. The pasture turned out to be near the World Trade Center.
Other clues were too complex and perplexed many in the city. Canadian Club had to create a phone line dedicated to giving updated weekly clues. More than 13,000 calls came in each week.
Eventually, the clues led Blewett and Jackson to a penthouse office on Madison Avenue. They told the receptionist they were seeking the case. It was under her desk.
"She'd been sitting on it all this time," Blewett said.
The pair split the booze, with Jackson taking the case cover and Blewett the bottom. He finally threw it out two years ago as part of a process of cleaning out his house to eventually retire to Florida.
While Blewett said he enjoys the taste of Canadian Club, don't expect to see him with a glass anytime soon.
He explained: "I'm a beer drinker, for the most part."