There's quite a few variants of 33-34 heads and like Terry stated above MOST of the gennie ones don't have ford on them . Some have no markings other than the usual stamped stuff top front . The later ones also have smaller spark plug openings . There was a thread about the HT markings on later ones and Don Rodgers had the Good info on that and also touched on the different suppliers of them . He may have further info on these heads .I personally just buy the ones with recessed part # and no Ford script and the un-marked ones - both these types have the proper large plug opening and the first type shows up consistently on gennie 33 motors . The LH posted above looks like a gennie late 34 to me . Hope this helps as these can get expensive if nice and a guy hates to buy the wrong ones . David J
