Massey Harris tractors in General Chat Posted April 11 1 hour ago, IH Forever said: I don't remember it, but my Grandpa talked about having a MH44. I kind of remember him saying it had a Plymouth motor and how it would go quite fast down the road. Can anyone shed some light on that for me? Was this some type of a conversion? The gas 44’s had a 4 cylinder continental ohv motor. The combines of the same era had Chrysler flathead sixes so it is not inconceivable that someone might have put one in a 44. A six is a smoother, higher reving motor than a four so could probably move down the road pretty good. I put a 235 Chevy motor in a f30 once….that could move pretty good too!