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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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#10291 05/08/2004 9:51 PM | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | The UC stands for upper center, the way chev called TDC at that time. The triangle is for checking cam timing and is explaned in the shop manual.I believe 216 are timed at 5 degrees before and 235 are timed at TDC originally, so you will get the best performance seting the timing by ear.
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