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Labor Day Putting down your wrenches or time for
MORE wrenching? 
Plenty of places to share. | | Click on image for the lowdown. 
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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: Jan 2008 Posts: 159 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 159 | my understanding with the DRAC and dip switch was so you could calibrate your speedo with the different tire sizes and rear end gearing , and with all the combinations with the dip switch on that site I can't see how it will only correct by .5. Has he even tried a DRAC with dip switch, at the local pick n pull I pick up a DRAC for $5 and a dip switch for like $1, for $6 it was worth the try
1938 Gmc 1/2 ton
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