Y-block, yes, 292, no. 239.4 cubic inches. First year of the Y-block used in the trucks smaller than F-750, as well as cars. All, received the flathead until '53. This is also a one year only Y-block, as the cam journals are larger than all the other Y-block motor. There is also a different tooth count on the ditributor, and the oil pump is a tang drive, as opposed to the later hex drive.