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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: Feb 2001 Posts: 1,094 'Bolter | | 'Bolter Joined: Feb 2001 Posts: 1,094 | The harmonic balancer and the flywheel are externally balanced, you will see that right away. If my foggy memory serves me right you will notice the 400 had a different setup for the freeze plugs on the side of engine, don't remember exactly (it's been a LONG time )but I think that they only had 2 on a 400 and maybe it didn't have freeze plug under engine mount.
Tommy
59 apache 1/2t
261 short stepside
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