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Click on image for the lowdown. 
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Sep 2003 Posts: 343 Member | | Member Joined: Sep 2003 Posts: 343 | This was just discussed not to long ago here and the answer that was given, was that plug was tapped and installed after they drilled the oil channel that feeds oil to the rocker oil tube assembly.
1954 GMC 1/2-ton Longbed
1971 Pontiac LeMans Sport
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