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Thank you all for the info , glad my heads are correct..not that it matters as it has more replacement parts than original.
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The D1 in the casting number indicates that they were initially designed for the 1971 model year. That is not a hard and fast rule, as...
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So the “1” in D1AE does not mean it was designed in 1971?
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Hello all. I am putting my 1971 M code 351c together and noticed my 4v closed chamber heads had the casting numbers of D1AE-GA so I...
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The D1 in the casting number indicates that they were initially designed for the 1971 model year. That is not a hard and fast rule, as...