· Premium Member
The 7D5Z means the engine was assembled April 5, 1967.
and theThe 7D5Z means the engine was assembled April 5, 1967.
intake manifold is definitely C50E, but the exhaust manifolds are C60E-9430-F and C60E-9431-FAre you sure that's C5OE and not C6OE? I found a listing for an intake manifold with C6OE but not C5OE. Basically it's a 4 barrel intake manifold for a Mustang/Falcon.
You are quite right. C5OE means the part was engineered in 1965 (C5) and paid for by the Fairlane Group (O). Might have been used for 2-3 years before a revision was needed.The casting numbers show the first year that part was made, but often the same part gets used for a few years. If they made a 2V intake casting in '65, and didn't change the casting (which would change the part number) for a few years, then you can see why a "C5__" part number might be original on a block that was cast in 1967. The block part number and casting date are on the lower passenger side rear part of the block, roughly where the starter overhangs it.
pull the valve covers and look for the engine size cast into the head, it will be 289 or 302. there will also be a 2V or 4V cast in the valley of the head along with a date code.i just bought a 289, the people didnt know what it came out of and im having a hard time figuring it out. the intake is stamped 289 4 C50E-9425B i also found a stamp that says 7D5Z i believe its the date? any help would be greatly appreciated