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Mod | | | Forums66 Topics128,078 Posts1,056,044 Members48,433 | | 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 2015 Posts: 6 New Guy | | New Guy Joined: Sep 2015 Posts: 6 | I recently replaced my original instrument cluster, as none of the gauges worked, with one i bought from classic Industries. After installing a new wiring harness(for the whole truck) we hooked up the cluster and the speedometer reads about 30 mph's faster than the correct speed. Any suggestion how i can calibrate this or at least get it closer to correct speed?
The Truck has a 350 small block with an automatic transmission that replaced the original 6 and 3 speed (this was done before i bought the truck).
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