July 2 / 64 build date- Car has been in our family since 1970.
Water pump on the 289 was not black but bare aluminum C5AE-8505-D.
I think Manell calls for -A, or -C as original for this engine, but it is a late build.
Is this -D just the service part code item?
Does it present to judging any better than cast iron later pumps, and worth a rebuild, or is it a full markdown for not being -A, -C?