dew 101,
CON3 F100 should indicate June 10, 1960. If it is a 261 from 1960 it should have a full-flow oil filter, with 1/2" NPT fittings for the oil filter and the drive-in pin on the manifold side of the engine -
261 oil filter fittings. A 235 (or earlier 261) came with 1/8" NPT fittings for a bypass filter -
photo of bypass filter fittings. What type of front or side engine mount attachments are on the block?
Has anyone ever seen a block without a casting number? I have seen several blocks without a number stamped on distributor pad, as replacement blocks usually came blank on the pad.
Could you post some images of the block and head similar to those that I have? Assuming that the engine is not in a vehicle.
