The first smallblock, not flathead, V-8 was the 1962 221 c.i. version. It was installed in the Fairlane.
The first Ford OHV small block was the Y block introduced in 1954 with 239 cu in. In 1955 it went to 272 cu in, 1956 292 cu in and 312 cu in. There was a 270 hp dual quad option in 1957 and a 300 hp paxton supercharger option. The NASCAR "racing kit" version was 340 hp. 1962 was the last year for the Y block in passenger cars. 1964 was the last year for the Y block in trucks.