Jan 2006
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Valve Cover Colors
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For V-8 trucks :
1960- 4-hole Black
1961- 2-hole Red
1962-64- 2-hole Yellow

6 Cylinders:
1960 - Flathead- silver
1961 Flathead- silver
1961 1/2 OHV- red
1962 OHV- yellow
1963-64 OHV- yellow 

The 2-to-4 hole valve cover change for the V-8's started with serial # 60V-13001...  "some" late 60's V-8's can be found with the 2-hole covers also. However- these are also painted black.