Up for sale is a set of 16 Pontiac screw in replacement rocker arm studs with oil hole to oil the rocker arms. I do not have all the years these studs fit. So here are some dimension on the studs.

total length 2-3/8 long

rocker end 1-7/16 long and 3/8-24 thread

head end 5/8 long and 7/16-14 thread

Hex 5/8

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