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Click on image for the lowdown. 
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Mod | | | Forums66 Topics128,042 Posts1,055,509 Members48,424 | | Most Online14,466
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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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Sep 2006 Posts: 841 Shop Shark | | Shop Shark Joined: Sep 2006 Posts: 841 | the factory tachs are operated electricly by a wire from coil like aftermarkets i believe. i have removed a couple and you need the original box under the pass dash with 4 terminals, i think. it's not gear driven. | | |
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