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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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| | | | Joined: Jun 2011 Posts: 1,901 Shop Shark | | Shop Shark Joined: Jun 2011 Posts: 1,901 | FWIW, If you are unsure of the marks, You can always put a piston TDC stop in the #1 hole as well.
With #1 coming up on the compression stroke but still at the bottom of the stroke install the stop and by hand bring up piston till it just touches the stop. Mark the Fly wheel where the pointer sits.
Then by hand reverse the rotation until the piston just touches again. Mark this and 1/2 way between the two marks it true TDC.
Give me ambiguity
or give me something else
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