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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: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | 261's do not seen to follow the same time line for changes as 235's.
A 1958 235 would not have the oil line behind the side cover.
If your 261 has the oil line it should have 1950-58 style rockers.
Those rockers will have the groove inside each rocker in the center and the rocker connecter tube will not be pinched off.
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