That last tach picture looks like a 4500 yellow line, and a 5000 redline. If it is for a small block Nova, then that would be correct, right?
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Rick
69 Chevelle SS396 Silver L78 M21 Post Sedan (Berger Chev.)
69 Chevelle SS396 Black L78 4-speed 4.10 Post Sedan

Don't text and drive.
Somebody's life may depend on it!