Re: HEI ignition secrets
You can get an idea if the timing light is close by dialing it back to 0 look at your timing (say 12 BTDC) then dial in 12 degrees in your timing light and look at the timing again. It should read 0 on the timing index plate
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Terry
1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC
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