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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: Dec 2006 Posts: 1,464 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 1,464 | The "55Z" at the end of the serial no. tells us it's a '55 235, solid lifter, 123 HP motor. The powerglide motors had a "Y" at the end of the serial no. The head no. is also '54-'55 and as such would have the 4-screw valve cover set-up. As has been said before, someone could have modified this to the 2-bolt style to make the engine look more original. | | |
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