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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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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: Jun 2008 Posts: 1,388 Shop Shark | | Shop Shark Joined: Jun 2008 Posts: 1,388 | My 2¢,
The polarity reversing switch was used to increase the life of the points, so the build up was not just on one side of the points. That's my understanding, although I could be wrong about this! I know the points on Model T coils have a longer service interval when the car is run on MAG (AC), instead of BATT (DC).
I don't think most people use them anymore. If you've got one, it would be cool to wire it up.
I could be all wrong about this!
If I am, someone will point (hahaha, get it?) it out. | | |
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