Did Dale Earnhardt Sr. drive a number 16 car in the Winston Cup Series?

Yes, Dale Earnhardt Sr did drive a #96 car in four races (Charlotte 1, Daytona 2, Talladega 2 and Darlington 2) for Will Cronkite in 1978. Below is a link to a photo of Dale in the #96 during the 1978 Firecracker 400.

According to racing-reference.info, the nine numbers Dale drove in Winston Cup racing were:

#2: 1979-1981

#3: 1981, 1984-2000

#8: 1975

#15: 1982-1983

#19: 1977

#30: 1976

#77: 1976

#96: 1978

#98: 1978