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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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#80477 07/26/2007 6:53 PM | Joined: Mar 2005 Posts: 1,029 Member | | Member Joined: Mar 2005 Posts: 1,029 | Only #1 and #6 are at TDC at the same time, but one of them will be at TDC on the firing stroke and the other will be at the end of the exhaust stroke and the beginning of the intake stroke. 120-140 degrees beyond the closing of the intake valve for #1 TDC on the firing stroke sounds about right to me. | | |
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