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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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#36101 10/23/2004 5:25 AM | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | There were subtle differences through the years but the main difference took place in 1959 when the groove inside the rocker was moved 1/4" off center so it did not line up with the supply hole in the shaft. That and the pinched off supply tube pressurized the oil supply in the shaft.
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