Thanks DonCasting numbers are often carried over to subsequent years. For instance, all 1971 351C blocks (except Bosses) are D0AE. The D4AE 351Ws were carried over through 1977.
after reading this again, I'm lost....Thanks DonCasting numbers are often carried over to subsequent years. For instance, all 1971 351C blocks (except Bosses) are D0AE. The D4AE 351Ws were carried over through 1977.
got it, thanks all.hetrickw, as Don C posted, the casting number is used for subsequent years and does not carry as much importance as the casting date. Ford never intended for the casting number to be used for any sort of positive identification. It was more of an internal use tool for the casting foundry and the powertrain engineers. Since the 351W was released in 1969, the blocks would indictate "C9AE". If there had been no changes to the block over the years, then a 351W block for a 1982 Ford would still indicate C9AE with the actual date it was cast in 82. But since there were changes over the years such as the one piece rear main seal, mid 90's roller camshaft, and emissions and durability upgrades, the block casting number would change with the engineering improvements. In fact a lot of blocks won't even have the "6015", just the prefix and suffix.
Ford had starting using a metal tag for engine ID starting in 1965, but we know what happened to most of those.
So it is certainly possible for you to have a block that was engineer upgraded in 74 and cast in April 28, 1975 and used for subsequent model years until another engineering change would mandate a casting number change.
Hope this has helped some as you can drown in these numbers trying to sort out engineering and part numbers, with some date codes thrown in for additional confusion!
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