ZL-1 heads (69)
anyone know about how many sets of ZL-1 heads GM made. I just looked at a set, I can't imagine they made a lot.
on the bottom are cast 678910, 12345, 11098, 4856
side stamp is EPD 6255
on the top is cast 3946074
each one has a few helicoils, which I guess are common?
but I am thinking these don't come up forsale often?
69 date code the most desirable?
-bob
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