Billy (1946-1979) and Benny (1946-2001) McCrary were born in 1946 in Hendersonville, North Carolina. At the age of 4, they contracted rubella, which caused permanent damage to their pituitary glands.

Their large size led them to have jobs at Circus Circus Las Vegas, where they road minibikes. They also wrestled in Japan under the name of the McGuire Twins.

They were inducted into the Guinness Book of World Records in 1978. At the time, they weighed over 700 lbs.

Billy McCrary died in 1979 in a motorcycle accident in Niagara Falls. Benny lived until 2001. They are buried in Crab Creek Baptist Church Cemetery outside Hendersonville, North Carolina.