Deffinetly looks like a later model 235 which is prefarable as they are preassure oiled rather than splash oilers/ babbit bearing motors like my '51 235 is, think they changed in '55 to compleatly preassure oiled, but the head changed in '53 to a head that took a valve cover that mounts with bolts around the sides rather than the early head, which had 2 bolts in the top like mine.