the casting number for the 906 heads is 10239906. The 062 heads have a sawtooth pattern on the front.
Derek
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1976 C10 Longbed lowered 5/7, hot 355/TH350. ~ SOLD
1974 C10 Shortbed Stepside 350/Saginaw ~ SOLD
1984 C10 Longbed 6.2l diesel 700r4. ~SOLD
1985 GMC C20 350 700r4, ~under the knife
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