OK....First off, what you found is a PART # for part or casting where you found it....and that's MHF and not MHP, (as in Massey Harris Ferguson) All Massey part #'s end in M1 or M2 on those tractors. From the time Ferguson and Massey Harris began to merge in 1953, until the merger was complete in 1957, the company was known as Massey Harris Ferguson. Castings designed during that period will have MHF on them. Since the castings saw continued use after 1957, the MHF was still shown through the series change in 1964.
Serial # will be on a small metal plate, approx. 2" X 3", located on dash, next to steering column. If you see 4 small holes there, good chance someone removed the data plate already. To pinpoint year of model, you'll need that serial number.
The tractor is a Massey Ferguson 50, w/Z134 Continental gas engine. (32hp @ pto) The hood emblem indicates early model production. Those tractors were built from mid year 1957, until late year 1963 when the DX series (100 series) went into production. At that time, the 50 was replaced by the 150. The hood emblem was identical to your picture from model intro to sometime in 1960 when it was replaced with a 1 piece emblem/air intake.
Check carb brand. If it's a CARTER, you probably have a VERY early production run tractor (1957 to spring of '58) They switched to a MUCH better running MS carb after that. The Carter carb was also used on the Ferguson F40, the predicessor to the MF50.