If the block has two small holes in the front up near the cylinder head, you've got a 1954 or early 55 235 engine. Late 55 through 62 has a big hole in the block (about 3" in diameter) and the water pump impeller projects back into the block. 216 and early pressure-oiled 235s have the same style of water pump, one where the impeller is behind a flat steel plate, outside the block. An 848 head is from a later model 235, around 57 to 62 or so. It will bolt onto the earlier 54-55 235 block.
Jerry
I have one more question from the information that's been posted. Hotrod Lincoln, you mention that it is a 1954 or early 55 235 based on the high mount water pump with the two small holes. You convinced me of that, but the casting numbers on the block that have the conveyor number were CON 4, D 166. That seems to tell me it was conveyor 4, April 16, the 6 means the 6th year of the decade. If that's how the code is read, wouldn't that make it 1956. Is there possibility that they overlapped the production years, going at least into April of 1956? I guess unless we were there, we may never know.
