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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!
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| | | | Joined: May 2005 Posts: 8,983 Sir Searchalot | | Sir Searchalot Joined: May 2005 Posts: 8,983 | I would not use a internal resistor coil because I just don't trust them and don't know how to check them. So I always get an external and use a ballast or a resistance wire if vehicle is equipped. When starting a resistance wire motor on an engine stand I just add a temporary ballast. The points don't just burn out quickly without one but over time. Some people run no ballast for years, why? I don't know. Just get what's called an E30 coil and a RU4 resistor. (O'Reilly's or equiv.). Delco-Remy coil U505. Resistor has no polarity. Let us know if you need help in wiring it up. I may be screwing you up because I'm assuming it's converted to a 12 volt system. If not, or a hybrid, stand by for revision by others before you "buy" my info. Your coil should be marked "12V" and say "internal" or "External" on it. Check it out to see the markings or a part number.
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
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