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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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Mike,
Nothing needs to be drilled or tapped. It seals fine on 1954-1962 235 and 261 blocks. Just make sure the entire bottom edge of the valve over is even/level.
The 4 holes for the machine screws that held the original valve cover in place are covered up by the old-style valve cover.
Tim | | |
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